Sign in with Microsoft
Sign in or create an account.
Hello,
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.

Symptoms

This issue occurs in a domain that has no global catalog servers. This issue occurs after you apply Cumulative Update 5 or a later version of cumulative update for Microsoft Exchange Server 2013 (Cumulative Update 6 or Cumulative Update 7). When this issue occurs, you receive the following error messages:

[Time_Point_1] [2] [ERROR] An Active Directory error 0x51 occurred when trying to check the suitability of server 'domain_controller_name'. Error: 'Active directory response: The LDAP server is unavailable.'

[Time_Point_2] [2] [ERROR] The LDAP server is unavailable.


Note This issue will not occur if you upgrade the domain controller (DC) to a global catalog.

Cause

This issue occurs because of a change that introduces DC stickiness for writable sessions into Cumulative Update 5 for Exchange Server 2013.

Resolution

To resolve this issue, install Cumulative Update 8 for Exchange Server 2013.

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Was this information helpful?

What affected your experience?
By pressing submit, your feedback will be used to improve Microsoft products and services. Your IT admin will be able to collect this data. Privacy Statement.

Thank you for your feedback!

×