habe exmerge am dienstag gebraucht und bin nach diesem how to vorgegangen wie üblich und es hat sofort funktioniert.
To grant your administrative logon account temporary rights to read all mailboxes in an Exchange database
1.
Create a Windows Security Group, and name it something such as "Exchange Recovery Administrators".
2.
Add the Windows account you are using to run ExMerge to this group. This account should already be an Exchange administrator account and have local administrator permissions on the Exchange server(s) involved in the mailbox merge process.
3.
In Exchange System Manager, locate the target database and open its Properties dialog box. On the Security tab, add the Exchange Recovery Administrators group and grant this group Full Control permissions on the database.
It may be necessary to wait up to 15 minutes for the permissions granted to take effect. Alternatively, you can reset cached permissions by stopping and restarting all Exchange services, the IIS Admin Service, and the Windows Management services. Because of this latency, you should grant necessary permissions as soon as you know you will need them, not just before you need to use them.
Note
As of this writing, only Receive As permission is essential for ExMerge to function properly with a database running in an ordinary storage group. You can therefore restrict the Exchange recovery administrators group to this permission rather than Full Control. If granting only Receive As permission does not work, you should then grant Full Control as an initial troubleshooting step.
gruss
smü