you want to go to only one tape.
you can have many many storage units set up - and the total number of drives in all of your storage units can be more than the number of tape drives you have.
Just create a storage unit with 1 tape drive and set the exchange policy to use it.
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as to the other issue - you said you have 2 exchange servers - are there passive copies on each one?
what I have observed
parent job dag - goes and sees what it is suppose to back up
child job for serverA - sees that there are mailstores on serverA it needs to backup so it makes a parent job just for serverA
grandchild job - for mailstore A
grandchild job - for mailstore B
child job for serverB = sees that there are mailstores on serverB it needs to backup so it makes a parent job just for serverB
grandchild job - for mailstore C
grandchild job - for mailstore D
so this could be part of what is causing 2 tapes or contention when multistreaming.
try putting each mailstore in the backup selection
it could also be if you try to run two many streams at once the exchange server just cannot handle it.
has anybody monitored the exchange servers when backups are running to see if you are killing it.
are both exchange servers listed in someother policy? Meaning if you go to the client list do you see both exchange physical server names listed?
and do you have both servers in the master server properties under distributed application restore mapping?
