Recover Domain impact on Block Environment

Hello all!

I'm working with a 3rd-party support vendor to rebuild the File side of a Unified VNX 5400.  The rebuild went fine, but now in Unisphere we're getting "split-brain" behavior: Signing into the Primary control station shows all Block options greyed out.  Same with Signing into an SP directly - All File options greyed out.  We were looking into running the "Recover Domain"  option from the Domain Master's /setup page, but I'm concerned about what it will do to the Production Block environment.  I don't want users/hosts to lose connectivity to their LUNs.

We just need to clear out the old File environment data and re-add the newly built File environment.

Is running the Recover Domain option  on the /setup page the best way to go?

Thanks in advance!