Hello,
You can use 1 database - 2 different installation , (like Virtualmachinedb, Virtualmachinedbtest) 2 VMM installations.
But you can not share same database with 2 different VMM Installation.

Sincerely,
Murat Demirkiran
If the post helps you and remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. www.scvmm2012.com (TR Language) Please note that I'm not a Microsoft Representative
or SpokesPerson.