Sametime server configuration requires to define an organization Directory attribute used as a internal Sametime ID (for example, user's email, distinguished name, etc.).
The internal Sametime ID is shown on the Sametime Community Servers->Community Services panel of the SSC:
The blank field means that DN is defined as Sametime internal ID.
If a persistent cache file is created prior to the Sametime ID changing, the resolved names from the cache are not valid in Sametime Community. The Sametime Community is not able to pass correct user status to the PresenceAdapter
Resolving the problem
If Sametime ID is changed (it means another attribute is chosen) and the persistent cache already exists, the administrator should remove the existing cache and initialize the new cache.
The persistent cache files are located on TAS machine according to the following key in the /enterprise/ibm/st.cached.resolve.properties file:
The following actions need to be done:
1. Stop TAS.
2. Delete all existing cache files from the /enterprise/persistent folder.
3. Start TAS.
The new persistent cache should be created according to the "Initializing the persistent cache with the Java Toolkit CachedResolveBatchMode application" topic in the Sametime Unified Telephony 8.5.1 Installation chapter of the 8.5.1 Info Center.