The solution's stability is connected to your AD. The only way the solution would lose stability is if the OU structure is not deployed correctly. 

For example, your domain controller connects on different sites and the solution relies on that information to operate. If the controller has an issue syncing, then the solution will too. 

It is important to read white papers to confirm compatibility. 

ManageEngine ADManager Plus is a very stable solution.

I rate ManageEngine ADManager Plus' scalability a seven out of ten. 

I would rate the stability an eight out of ten. It's pretty straightforward.

It is a stable solution.

It is a very stable solution. We do not face any troubles when we attempt to migrate the database from My SQL to MS SQL.

The stability has been good so far.

The solution is stable.

We haven't had any issues with stability. 

This solution is not stable. We were trying to implement several users at once and suddenly it failed. It crashed.

The stability is perfect. There are great features with lots of complexity but once I reach the managing engine AdManager, it's very easy, so stability is so wonderful.