Adding member to DAG error

Thanks for the replyAndres-Bohren 

The Exchange Servers are in different subnets:

192.168.20.10 (main)

192.168.30.10 (DR)

The DAG has the following IP addresses specified:

192.168.20.11

192.168.30.11

Only one network per server (no separate replication network).  The DR one is the one that won't join the cluster.  The DR server can ping both IP's of the main server (MAPI and cluster assigned IP), the main server can ping the DR IP.

I tried setting the DAG network to be manually configured and added the subnets.

Here is some more info from the dagtasks log:

WriteError! Exception = Microsoft.Exchange.Cluster.Replay.DagTaskOperationFailedException: A server-side database availability group administrative operation failed. Error The operation failed. CreateCluster errors may result from incorrectly configured static addresses. Error: An error occurred while attempting a cluster operation. Error: Cluster API failed: "AddClusterNode() (MaxPercentage=12) failed with 0x80070005. Error: Access is denied". ---> Microsoft.Exchange.Cluster.Shared.ClusterApiException: An error occurred while attempting a cluster operation. Error: Cluster API failed: "AddClusterNode() (MaxPercentage=12) failed with 0x80070005. Error: Access is denied" ---> System.ComponentModel.Win32Exception: Access is denied

I tried running the powershell command from both servers and get the same error on both.  The Verbose command doesn't give any more info.