Signed out of SIP service

[Amihai Bareket]

I'm using LCS 2005 on my network (Windows Server 2003 Domain).
Quite a lot of my users keep getting signed out of messenger (usually at
night). They're getting this error message -
"You have been signed out of sip communications service because your
authorizations has changed.
please connect again with your new authorizations".

What's causing this?

Amihai Bareket

 

[Dhigha D Sekaran]

Amihai,
There are previous postings in the newgroup which discusses this issue...

Are you on kerboros? Can you try changing it to NTLM and see if it fixes
your problem...

From what I heard this is due to an issue in the windows kerboros
implementation and there is a hot fix available for this issue......

Thanks,
Dhigha

 

[Amihai Bareket]

We're using Kerberos.
Can't switch to NTLM due to network and security restrictions.
Do you know the hot fix number for Kerberos?

Thanks,
Amihai

 

[Dhigha D Sekaran]

Amihai,
Tom has a not on his in his blog
http://blogs.msdn.com/toml/

Please see the issue titled "LCS 2003: Windows Messenger on XP clients
signed out overnight using Kerberos"

Also i hear the issue is fixed for w2k3 and winxp2. I am trying to gather
more details on this.
Shall keep you updated.

Thanks,
Dhigha