Hi Alex,
I have exactly the same problem here as IHATEXP, I have a win2k member server SP2 running Exchange 5.5 SP4 and installed the Arcserve 2000 exchange agent + SP3.
I have created a backup account, (UKDBAgent)given it all the group memberships required (administrator, domain admins, Backup operator) and local security rights (Act as part of the operating system, logon as a service and logon locally). I have created a mailbox for this user with a name and alias of UKDBAgent. I have given the Domain\DBAgent account service admin roles in the 3 levels of Exchange (org,site and config). Do I need to restart the Exchange services?
I have also created a local user on the Exchange box with exactly the same name an user rights and group memberships.
Installed is the Exchange client version 4. I can send mail to this account, logon to the domain as UKDBAgent, open Exchange client and read the email.
However when I try to authenticate the Arcserve Exchange agent configuration it immediately returns the EC=122 error.
If however I put the local machine name in the field where the domain should be it does actually go off and tries to authenticate but fails with the message (failed to open the information store), this I think is because when I put the local machine name in it uses the local account information.(which you can't assign Exchange service admin rights to.)
Any ideas would be great
thanks
Andrew