forgive me for asking but can I just sanity check something.

when you say you getting the "Replicated devices could not be matched with datastores in the inventory" message which SRM server are you logged into to see this?

if we assume you started with SiteA and SiteB with replication going A -> B then you would have had for example ProtectionGrp1 at SiteA and RecoveryPlan1 at SiteB

You then failed over to SiteB and recoverpoint under the covers reverses the replication in a dynamic swap fashion so your replication is now going from B -> A

It sounds like your hitting the "Rescan Arrays" button still logged into the SRM server at SiteA, I just need to check if that is the case as that is incorrect.

What you need to do is login to the SRM server at SiteB, configure the array managers (SRAs) at SiteB but obviously now your at SiteB the information your enter for "Protected Array" will be that of the RPA environment at SiteB since that is now in effect the protected array as the replication is going from B->A now. The "Recovery Array" entry screen in SiteB's SRM server would then be populated with the RPA details for SiteA's array. Once done and datastore groups visible you then create a new protection group in SiteB's SRM server and then a new recovery plan in SiteA's SRM server.

apologies if I am preaching to the choir here but it that error message just sounded like you might have been running "Rescan Arrays" from either the wrong side or have entered the SRA config information the wrong way round at SiteB

ensure that you also "Rescan Arrays" for devices for ALL ESX hosts at SiteA before you do anything in SRM at SiteA in terms of recovery as you need to "refresh" ESX's view of the storage layer.

cheers

Lee