multisite comptability

Installed on the Multisite, not specified whether it is compatable with multisite or not.

But it seems it was when worked around and played with certain testing functionality which worked with single installation on multisite network activation and used in subsite. As the site was crashed down the development was re initiated.

Now when we installed on Multisite, did network activate but failed to work and thereby had to activate indivudal activation. Worried about syncing of user created under each subsite and it saccess control.

Not sure how it worked previously way long, but please to clarify this