All, 

System: Win2K SP2 and Exchange 2000 SP2.

For no appearant reason, none of my IM users could log on to IM today.
They are receiving This error:

"Signing in to Microsoft Exchange IM failed because the service is
temporarily unavailable."

And on my Exchange 2000 server, the followings are logged in Event
viewer:

Source: MSExchangeDSAccess
Category: General
EventID: 2050
Description: Process DLLHOST.EXE
/PROCESSID:{3D14228D-FBE1-11D0-995D-00C04FD919C1} (PID=2800). The shared
memory heap could not be created. 

Followed by:

Source: MSExchangeIM
Category: Network Layer
EventID: 28674
Description: The network layer could not be initialized (Error
c0040802). 

All other exchange functionailities have no problems.

Has anyone encountered any of these?  Search on MS and EventID.net
showed up nothing.

Thanks,

Andrew,

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