How to fix “Active Manager Failed To Mount Database”

Problem: Activity Manager is not able to mount the database and the public folder database correctly.


Active Manager failed to mount database MailStore 01 on server {Server-name}. Error: An Active Manager operation failed with a transient error. Please retry the operation. Error: Database action failed with transient error. Error: A transient error occurred during a database operation. Error: MapiExceptionNetworkError: Unable to make admin interface connection to server. (hr=0x80040115, ec=-2147221227).


Active Manager Failed To Mount Database

Active Manager is a DAG component which is responsible for deciding which database is Active and Passive. The Active Manager runs on each Mailbox server as a service. In addition, we have “Active Manager Client” which runs on all CAS and Hub Servers, this role communicates with PAM and SAM.Primary Active Manager and Secondary Active Manager – PAM could be only 1 and the others are SAM. PAM called ” Bestcopyselection ” if one server was corrupted the PAM starts the calculation process and decides which server is the best selection for mounting the DB.

The Solution that helped me out is:

  1. Open ncpa.cpl on the server.
  2. Go to Settings and click Properties on the server.
  3. Make sure “Internet Protocol Version IPv6” is enabled.

Active Manager Failed to Mount Database

About Meir Peleg 337 Articles
My name is Meir Peleg, (Born 30/04/1991) live in ISRAEL. Live and breath IT world. Microsoft MVP Windows IT & VMware vExpert.