Exchange 2010 database pointing to a cas server instead of the cas array

Hi

I have a DAG with Exchange 2010 sp2.

There are three mailboxes that host three databases and two CAS servers in a CAS array.

The CAS array internal URL is casarray.mydomain.local.

My problem is that the RPCClientAccessServer value on one of the databases points to cas01.mydomain.local instead of casarray.mydomain.local.

If I use the set-mailboxdatabase –rpcclientaccessserver cmdlet, the value of the database changes to casarray.mydomain.local but after a while it reverts back to cas01.mydomain.local.

The other two databases are pointing to the CAS array and I don't have that problem with them.

Any idea how to fix this or why it happens?

Thank you.