This is not working,
Its still stuck at 10 active migrations, what is the current way to increase the number of migrations past 10?How many mailboxes will are migrated at once?
Queued items are processed concurrently. A maximum of 10 items are migrated at once (prior to Version
7.04, this was 4). You can adjust this value by editing the following registry key:
Root: HKEY_LOCAL_MACHINE\SOFTWARE\[Wow6432Node\]Mail Enable\Mail Enable\Migration
Value Type: DWORD_32
Value Name: Queue Processing Concurrency Limit
Value: Number of concurrent mailboxes to import. Default value is 10.