The information below is a list of MS KB's that have been released against LCS 2005 since February 2004.
Whilst the list is evidently not complete I would be grateful if you could please let me know those MSKB's along with other updates that I have missed
Arthur
12/7/2006
925245
Error message when you run the Live Communications Server 2005 administrative snap-in: "Failed while reading the server information from WMI"
11/28/2006
926921
A blank Live Communications Server 2005 MMC snap-in appears when you start the Live Communications Server 2005 administration tool
11/28/2006
924604
Presence information of users who are added to new pool is unavailable to users who are in a direct federated site in Live Communications Server 2005
11/28/2006
925229
A peer server is unable to successfully authenticate with a Live Communications Server 2005 Service Pack 1 access proxy by using TLS authentication
9/20/2006
924189
Error message when you try to install Live Communications Server 2005 Archiving Service on a computer that is running Live Communications Server 2005 Service Pack 1: "Error 1722" - Describes an issue that occurs when hotfix 911996 is installed on the computer. Provides a workaround.
9/14/2006
925338
Support WebCast: How to plan for and deploy certificates in Live Communications Server 2005 Service Pack 1
7/30/2006
922228
Error message 503 is returned when a client computer tries to connect to an Office Live Communications Server 2005 server
7/30/2006
922655
A computer that is running Live Communications Server 2005 may stop responding
7/30/2006
922232
A message session cannot be completed when an internal user or a remote user uses Office Live Communications Server 2005 to initiate a conversation
7/30/2006
922231
A request that is sent to a Live Communications Server 2005 access proxy array is rejected
7/30/2006
922230
Remote users cannot sign in through an Access Proxy, and all messages may be unexpectedly discarded by Live Communications Server 2005
7/30/2006
921543
Description of the Live Communications Server 2005 post-Service Pack 1 hotfix package: July 21, 2006
7/14/2006
922771
File list information for other language versions of the Microsoft Office Live Communications Server 2005 update: July 11, 2006
6/2/2006
919623
Error message when you use a server that is running Live Communications Server 2005 Service Pack 1 to create an Enterprise pool or archiving database on a back-end server that is running SQL Server 2000: "Failure [0xC3EC78C5]"
5/4/2006
918284
The Public Instant Messaging Connectivity (PIC) feature does not work in Live Communications Server 2005 Service Pack 1 (SP1) - Describes an issue in which the PIC feature does not work when you use trial certificates or Entrust certificates on a LCS Access Proxy computer that is running LCS 2005 SP1. A resolution is provided.
3/16/2006
915115
Error message when you try to activate Microsoft Office Live Communications Server 2005:"[0xC3EC7821]" - Describes an issue where an error message occurs when you try to reinstall and activate the Microsoft Office Live Communications Server 2005. Resolution is provided.
3/16/2006
904951
The Live Communications Server service stops responding when you perform a batch presence subscription in Live Communications Server 2005 - Describes a problem in which the Live Communications Server service stops responding when you perform a batch presence subscription in Live Communications Server 2005.
3/16/2006
913092
A custom telephone number normalisation rule is not applied by the Live Communications Server 2005 SP1 version of the Address Book Service (AbServer.exe) - Describes a problem that occurs in a telephone number matches the E164 normalization rule. A software update is available to resolve this problem.
3/16/2006
910208
You receive a "This page contains both secure and nonsecure items" warning message when you log on to Communicator Web Access - Describes behavior in which you receive a "This page contains both secure and nonsecure items" warning message when you log on to Communicator Web Access if you have a federated contact from another organization.
3/16/2006
906594
A public certification authority certificate is required for PIC in Live Communication Server 2005 Service Pack 1 - Explains that you must use a certificate issued by a public certification authority that is in the default list of trusted root certification authorities, if you want to use Public IM Connectivity in Live Communication Server 2005 Service Pack 1.
3/16/2006
907862
Description of the update for the Live Communications Server 2005 Service Pack 1 Capacity Planning Toolkit: December 15, 2005 - Describes the Microsoft Office Live Communications Server 2005 Service Pack 1 Capacity Planning Toolkit issue that is fixed in this update.
3/16/2006
898889
You should not select the ForestPrep option when you install Live Communications Server 2005 Service Pack 1 - Explains that running ForestPrep may cause an error when you install Microsoft Office Live Communications Server 2005 SP1. To resolve this problem, do not select the ForestPrep option when you install Live Communications Server 2005 SP1.
3/16/2006
911788
You cannot install Microsoft Office Live Communications Server 2005 SP1 on a server that is running the MSDN version of Live Communications Server 2005 - Describes an issue in which you can not update the MSDN version of Live Communications Server 2005 to the retail version of Live Communications Server 2005 SP1. Includes a resolution.
3/16/2006
912219
Description of the Live Communications Server Service Pack 1 Resource Kit update - Describes the Microsoft Office Live Communications Server Service Pack 1 Resource Kit issues that are fixed in the update.
3/9/2006
912447
You receive an incorrect message that states that no certificate has been configured when you use the LCS Diag tool in Live Communications Server 2005 with Service Pack 1
3/8/2006
908155
The "proxyAddress" attribute is not populated with an SIP URI when you enable a user, contact, or inetOrgPerson object for Live Communications after you install Live Communications Server 2005 Service Pack 1
3/8/2006
915114
Error message when you try to log on to Live Communications Server 2005 with Service Pack 1 by using Communicator Web Access: "The server is unavailable"
3/8/2006
913032
An inactive endpoint may accept a communications request after you install Intelligent Instant Message (IM) Filter in Live Communications Server 2005
3/8/2006
906280
You cannot start the Live Communications Server 2005 MMC on specific computers in your organization
2/16/2006
913002
A software update is available to optimize the presence update logic in Live Communications Server 2005
2/16/2006
911996
Description of the update for Live Communications Server 2005: February 10, 2006
1/7/2006
912311
The Date field is incorrect when you use the Lcsarchexport.exe tool from the Live Communications Server Service Pack 1 Resource Kit to export the original conversation date of an e-mail message
1/7/2006
911789
When an internal user views an instant message that was sent from an external user, the message does not contain any text in Live Communications Server 2005
12/31/2005
911786
You cannot sign in to a server that is running Live Communication Server 2005 or Live Communication Server 2003 through a Cisco PIX firewall
12/30/2005
911785
Error message when you configure a certificate for an external connection on a computer that is running Live Communication Server 2005: "Live Communications Server requires a certificate that has both Server and Client Authentication attributes"
12/23/2005
911783
After you enable an SIP account, the SIP account cannot log on to a Live Communications Server 2005 server
12/23/2005
911787
Error message when you use the Create/Upgrade Enterprise Edition Pool Setup program to create a Live Communications Server 2005 enterprise pool on a Microsoft SQL Server 2000 cluster: "0xC3EC7840"
12/10/2005
903927
A memory leak occurs when a computer that is running Live Communications Server connects to another Live Communications computer that has SYN attack protection enabled in Windows Server 2003 Service Pack 1
11/30/2005
911730
TechNet Support WebCast: Live Communications Server 2005 with Service Pack 1 – Deployment
11/24/2005
911549
TechNet Support WebCast: Live Communications Server 2005 with Service Pack 1 – Planning
11/2/2005
898892
The RTCLobDbImpExp.dll resource file is not installed when you install the Live Communications Server 2005, Archiving service
10/22/2005
898890
Live Communications Server 2005 stops responding with an error signature that refers to the RtcSrv.exe file
10/20/2005
906597
You may receive an "[0xC3EC783C]" error message when you run the Create/Upgrade Enterprise Edition Pool Setup program in Live Communications Server 2005
10/12/2005
906595
A public certificate that is in the service store may appear invalid on Live Communications Server 2005 because of an expired intermediate CA
10/8/2005
893068
The "LcsCmd /?" command does not display command-line help in the German and Japanese versions of Live Communications Server 2005
9/30/2005
898891
You receive the "Error 27765: failed to create LCS server database" error message when you try to install Live Communications Server 2005 or Live Communications Server 2005 Service Pack 1
9/30/2005
898893
Federated users cannot send instant messages to internal users in Communication Server 2005 Enterprise Edition
9/24/2005
906596
Event ID 30011 is logged in the Application log after you install Live Communications Server 2005 on a domain in a forest that has multiple domains
9/1/2005
898894
The Live Communications Server 2005 console unexpectedly quits when the administrator clicks the Users node under the "Live Communications Server 2003" node
7/20/2005
903057
When you try to upgrade to Microsoft Live Communications Server 2005 with Service Pack 1 Administration Tools, you may be repeatedly prompted to insert the Live Communications Server 2005 Service Pack 1 (SP1) CD
7/20/2005
903056
Description of the Windows Messenger client basic protocol port usage for instant messaging, file transfer, audio, and video
6/18/2005
900253
When you try to add a database to the Recovery Storage Group, the Exchange System Manager program may crash
5/29/2005
898516
After you prepare the Active Directory forest for the installation of Office Live Communications Server 2005, the Prep Forest command is available in the Live Communications Server Deployment Tool
5/25/2005
892372
After you restore Live Communications Server 2005 from a backup, users cannot connect to Live Communications Server, and event ID 30961 is logged in the Application log
5/11/2005
898150
You receive a "The following message could not be delivered to all recipients" error message when you send an instant message to a user in Live Communications Server 2005 Enterprise Edition
5/4/2005
898152
When you try to prepare the Active Directory schema for the installation of Live Communications Server 2003 or Live Communications Server 2005, you receive an "Action failed with error code 0x80070035" error message
5/3/2005
898153
You receive an HTTPS or TCP connection could not be made error message when you try to connect to an Office Live Communications Server 2003 Home Server or to an Office Live Communications Server 2005 pool by using Windows Messenger
4/30/2005
898518
Description of the number of contacts that you can configure in Microsoft Windows Messenger when you are connected to Live Communications Server 2003 or to Live Communications Server 2005
4/29/2005
897690
Description of Live Communications Server 2005 Service Pack 1
4/29/2005
897674
How to obtain Live Communications Server 2005 Service Pack 1
4/29/2005
897567
Known issues that occur with public instant messaging after you install Office Live Communications Server Service Pack 1
4/27/2005
898517
Event ID 30983 is repeatedly logged on a Live Communications Server 2005 front-end server after you restart another front-end server in your enterprise pool
4/25/2005
898151
The Schema Preparation option is not available in the Office Live Communications Server 2005 Deployment Tool
4/9/2005
897536
Remote users cannot communicate with other remote users or with internal users in Live Communications Server 2005 - Describes a problem that occurs if the Live Communications Server Access Proxy does not have federation enabled.
4/2/2005
896144
You cannot access the "Message.AuthenticationInfo.SecurityToken" property in Live Communications Server 2005 - Explains that this property is not available in Live Communications Server 2005. Access to this property is removed to help increase security in Live Communications Server 2005.
4/1/2005
896557
The Live Communications Server service does not start, and events are logged in the application event log after you activate a Live Communications Server 2005 computer - Describes a problem that occurs if the domain part of the Live Communications Server computer's fully qualified domain name does not match the primary DNS suffix of that computer
4/1/2005
896145
Users notice incorrect presence information, and an event ID 30961 message is logged in Live Communications Server 2005 - Describes an issue that occurs if one of the Live Communications Server front-end servers in an enterprise pool lose network connectivity. Install Windows Server 2003 SP1 to resolve this problem.
3/17/2005
894607
Remote users cannot communicate with other remote users in Live Communications Server 2005 - Describes a problem that may occur if remote users connect to Live Communications Server 2005 Standard Edition through an Access Proxy and not also through a director.
2/24/2005
894297
An invitation to an audio or video conversation or a file transfer request does not time out in a client program that is connected to Live Communications Server 2005 - Describes a problem that occurs because Live Communications Server 2005 does not generate a CANCEL request when an INVITE transaction times out.
2/18/2005
892990
Live Communications users cannot communicate with other users in Live Communications Server 2005 Enterprise Edition - Describes an issue that occurs if the FQDN of an enterprise pool is not published in DNS.
2/1/2005
892989
Remote users cannot communicate with other remote users or with internal users in Live Communications Server 2005 - Describes a problem that occurs if the Live Communications Server Access Proxy does not have federation enabled.
1/18/2005
890473
Entries for category (1015) events do not contain text in the Description field in Live Communications Server 2005, and some alert messages are not triggered in MOM 2005 - Describes a problem that occurs because a Live Communications Server 2005 registry subkey is incorrectly named.
12/27/2004
889440
You are not notified when the service account password is about to expire, and Event ID 12294 is logged on an Access Proxy or Proxy computer in Live Communications Server 2005 - Describes an issue where the password expiration checking functionality does not work on a Live Communications Server 2005 Proxy server or Access Proxy server that is not joined to an Active Directory domain.
12/27/2004
889327
An Active Directory forest with multiple trees does not appear as expected in the Live Communications Server 2005 MMC snap-in - Contains a hotfix to enable the Live Communications Server 2005 MMC snap-in.
12/27/2004
891061
Live Communications Server 2005 trial software may expire before the end of the 120-day trial period - Describes an issue that occurs if you obtained the Live Communications Server 2005 trial software before December 1, 2004.
12/27/2004
890296
You cannot establish a voice connection with a .NET Messenger user in Windows Messenger 5.0 - Explains that you cannot establish an audio connection or a video connection with a .NET Messenger user if you configure Windows Messenger to block all other SIP users.
12/27/2004
890297
You cannot move users from an Enterprise pool or from a Standard Edition server in Live Communications Server 2005 - Describes an issue that occurs if the server that you want to move the users from is offline.
12/27/2004
890298
You receive a "The call cannot be completed" error message or a "Your call did not go through" error message when you try to make a PC-to-Phone call in Live Communications Server 2005 - Describes a problem that may occur if TCP is specified as the transport protocol in a static route, or if an IP address is specified as the next hop address in a static route.
12/27/2004
890299
Multiparty instant messaging requests from an RTC 1.3 client program are sent to the custom media manager of an RTC 1.2 client program in Live Communications Server 2005 - Describes an issue that occurs because the RTC Client version 1.2 stack does not recognize the initial SDP data from the RTC Client version 1.3 stack.
12/27/2004
890301
Presence information does not appear correctly in a Real-time Communications Client program when you connect to Office Live Communications Server 2005 over a dial-up connection - Describes an issue where presence information for a connected user's contacts does not appear correctly, and BUDDY SUBSCRIBE events fail.
12/27/2004
890300
Custom branding tabs do not appear in Windows Messenger on a Windows Server 2003-based computer - Describes the issue where the custom branding tabs that you configured do not appear when a user runs Windows Messenger. Provides a resolution for the issue.
12/27/2004
890304
The "SIP Communications Service Account" area and the "Exchange Account" area do not appear on the Accounts tab of the Options dialog box in Windows Messenger 5.0 - Describes an issue that may occur if you cancel the Windows Messenger removal process before it is completed.
12/27/2004
890305
A sender does not receive a status code 302 response after a message is sent to an RTC 1.3 Client program in Live Communications Server 2005 - Describes an issue that occurs if the RTC version 1.3 Client program has multiple end points and if one of those end points is configured to forward calls.
12/27/2004
890676
Live Communications Server 2005 does not start after you configure a certificate for TLS or for Mutual TLS - Describes how Live Communications Server 2005 does not start after you move or copy a certificate from the user store to the local computer store. To resolve this issue, you must replace the existing certificate with a new certificate.
12/27/2004
890677
You receive a "Log File path is invalid" error message when you try to configure logging on a remote Live Communications Server 2005 computer - Describes an issue that occurs if you try to specify the path to a remote location on a remote Live Communications Server 2005 computer.
12/27/2004
889439
Changes to the spam filter are not automatically implemented on a Live Communications Server 2005 computer - Describes a problem that occurs after you configure the WMI settings for a default route IM spam filter on an Office Live Communications Server 2005 computer that is configured with the Access Proxy role.
12/27/2004
889442
No event is logged on the Back-End Database server when all servers in a pool become unavailable in Live Communications Server 2005 - Describes a problem that occurs if all the Live Communications Server 2005 Enterprise Edition servers become unavailable at the same time.
12/27/2004
889441
Users are not configured after you run the Configure Live Communications Server Users Wizard in Live Communications Server 2005 - Describes an issue that occurs when you try to configure users who are enabled for Microsoft Office Live Communications Server 2003.
12/27/2004
889936
What to consider when you configure IP address-based static routing in Live Communications Server 2005 - Instructs you to not select the "Replace host in request URI" check box in the "Add Static Route" dialog box when you configure an IP address-based next hop Proxy.
12/27/2004
890303
You cannot connect to a Live Communications Server 2005 pool, and you receive an error message - Describes an issue where a user cannot sign in to the SIP communications service and where the user receives an error message.
12/27/2004
890295
Windows NetMeeting unexpectedly quits after you accept a Whiteboard session in Windows Messenger 5.0 - Describes a problem that may occur if you accept a new Whiteboard session without first closing the previous Whiteboard session.
12/27/2004
889443
"Snap-in failed to initialize" error message when you click "Services and Applications" in Computer Management on a computer that is running Live Communications Server 2005 - Describes a problem that occurs after you remove both the Live Communications Server 2005 Administration Tools and the Live Communications Server 2003 Administration Tools.
12/27/2004
889937
Users cannot receive file transfers, audio, or video behind a NAT device in Windows Messenger 5.0 - Describes how one user cannot transfer data, audio, or video files to another user who is configured behind a NAT device in Windows Messenger 5.0. Provides links to additional information about Windows Messenger and Live Communications Server.
2/21/2004
834470
"Signing in to SIP Communications Services failed" message when Windows Messenger users try to sign in to Live Communications Server 2003 - Describes an issue that occurs if the name of the domain that is hosted by Live Communications Server differs from the SIP URI.
Arthur Pounder