I am getting this error when I attempt to update a mailbox database copy on 2 of my DAG servers.

I have 3 exchange servers in my environment. All run CAS and mailbox roles. The error states "Failed to open a log truncation context to source server" 0x80070057 SeedInProgress exception. Thus my databases on my replica servers are all failed and suspended. I have rebooted all servers but the error persists.

Hi Ziza,

Please try the following method and check if any helps:

1.Disable TCPChimney on the both the nodes  

netsh int tcp set global chimney=disabled 
netsh int tcp set global rss=disabled 

2. Run the following command to reseed mailbox database copy:

Update-Mailboxdatabasecopy -identity "DBName\ServerName" -Deleteexistingfiles -databaseonly