To recreate IM account:

1. Create an Active Directory (AD) account or use an existing one with the following properties:

   [Member of the following AD Groups]

   • Domain Users
   • IM Security Admins
   • RTCUniversalServerReadOnlyGroup
    

   The IM Security Admins should also be a member of the RTC Server Applications and RTC Local Administrators groups.

   [Additional Settings]

   • User not locked
   • Password never expires
2. Stop the following IM Security services:
   • Trend Micro IM Security Server
   • Trend Micro IM Security System Attendant
3. Open a command prompt (cmd.exe) with Domain or Local Administrator's privileges and change directory to %PROGRAMFILES%\Trend Micro\IM Security.
4. Run the following command:

   toolImAgentCfg.exe /u ad_account /p ad_account_password /t service_protocol /s poolFQDN:port

   Where:
   ad_account - Active Directory Account name
   ad_account_password - Active Directory Account password
   service_protocol - TLS or TCP
   poolFQDN - the Lync or OCS Pool Identification
   port - for TLS (5061), for TCP (5060)

   For example:

   toolImAgentCfg.exe /u lyncuser /p pwd123 /t TLS /s pool1.lynctest.com:5061

5. Restart IM Security services.