im currently migrating (550 users)  Exchange 2007 SP3 RU12 to Exchange 2013 CU7

the source (2007) server is located in a different AD site

the mailbox move is extremly slow.

sometimes the current move stalled with the message

Relinquishing job because of large delays due to unfavorable server health or budget limitations.

is did some research on the source and target server, but no resource constrains.

can somebody point me in the right direction?

already tried on the source server

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

the current connection between the two servers is 100Mbps

a completed user reports als high values for TotalStalledDueToWriteThrottle

but the desntination server is running fine, no latency issues at al.

sometimes a queued users that is copying messages stalls with RelinquishedWlmStall

details of that users

reports Relinquishing job because of large delays due to unfavorable server health or budget limitations.

resource configuration 2007 server

4 vCPU's

16 GB Memory

2008 R2 Server

resource configuration 2013 server

8 vCPU's

32 GB Memory

2012 R2 Server

• Edited by robcee Friday, February 13, 2015 11:47 AM

did you check the event logs?

Did you reboot both the servers or you may want to restart the MS Replication Services on Ex2013 server?

I will also try to move a mailbox from one DB on Exchange 2007 to another Database on the same Exchange 2007 and same thing on 2013 servers to make sure local move is fine.

during the mailbox movement from source to target,  enabled Replications for both MAPI(LAN) and Replications network on DAG , after finish mailbox movement, you can disable. (if replications is disabled on LAN NIC- which is recommended  )  , it's believed you have high speed NIC for LAN.

also move maximum 4 mailboxes from same database  up to maximum 5 databases at same time( 20 mailboxes),

• Edited by Indunil 5 hours 22 minutes ago add