exchange 2016 services stuck in starting

Question

Hi dear Expert

our exchange services stuck in starting and we get below event

"Process Microsoft.Exchange.Directory.TopologyService.exe (PID=4744) Forest xxx.xx Topology discovery failed, error details

No Suitable Directory Servers Found in Forest xxx.xx Site Default-First-Site-Name and connected Sites.."

Please give me hand to fix my issue

Answer 1

Hi @ramin sa ，

Any changes were made in the environment right prior to the occurrence of this issue?
Are there any other potentially relevant event logs recorded together with this one in the event viewer?
What's the basic topology of your Exchange environment?

Please try adding the MinSuitableServer value and see if it can help.
Reference: Event ID 2142 when Exchange services don't start

1. Locate Microsoft.Exchange.Directory.TopologyService.exe.config File , By Default It Should Be Under "C:\Program Files\Microsoft\Exchange Server\V15\Bin"
2. Open NotePad As Administrator & Then Open Microsoft.Exchange.Directory.TopologyService.exe.config File
3. Locate "Topology MinimumPrefixMatch"
4. Add MinSuitableServer = "1"
5. Save The File & Restart Microsoft Exchange Active Directory Topology Services.  

If the above doesn't work, please try enabling IPV6 on the primary server and check the result.

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