Exchange 2013 Migration Distribution Group Issue

Distribution groups are AD objects. You should be able to open it from both the console.

any error message you receive?
check all the services on Exchange 2013.
check event viewer for any errors.

This is the error in the Event viewer:

Log Name:      Application
Source:        MSExchange Control Panel
Date:          5/25/2015 8:33:07 AM
Event ID:      4
Task Category: General
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      RAMEXCHANGE.HPS.LOCAL
Description:
Current user: 'HPS.LOCAL/Users/admin'
Request for URL 'https://exchange.abc.local:444/ecp/UsersGroups/EditRoomMailbox.aspx?pwmcid=4&ReturnObjectType=1&id=0b0a9f36-ace3-4e23-abda-124d61c5cb08(https://exchange/ecp/UsersGroups/EditRoomMailbox.aspx?pwmcid=4&ReturnObjectType=1&id=0b0a9f36-ace3-4e23-abda-124d61c5cb08)' failed with the following error:
System.Web.HttpException (0x80004005): Request timed out.


Flight info: Features:[[Global.DistributedKeyManagement, False],[Global.GlobalCriminalCompliance, False],[Global.MultiTenancy, False],[Global.WindowsLiveID, False],[Eac.AllowMailboxArchiveOnlyMigration, True],[Eac.AllowRemoteOnboardingMovesOnly, False],[Eac.CmdletLogging, True],[Eac.CrossPremiseMigration, False],[Eac.DiscoveryPFSearch, False],[Eac.DlpFingerprint, False],[Eac.GeminiShell, False],[Eac.Office365DIcon, False],[Eac.UnlistedServices, False],],  Flights:[],  Constraints:[[mode, enterprise],[user, myriad@],[org, ],[loc, en-US],], IsGlobalSnapshot: False
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="MSExchange Control Panel" />
    <EventID Qualifiers="49152">4</EventID>
    <Level>2</Level>
    <Task>1</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2015-05-25T12:33:07.000000000Z" />
    <EventRecordID>37323</EventRecordID>
    <Channel>Application</Channel>
    <Computer>EXCHANGE.abc.LOCAL</Computer>
    <Security />
  </System>
  <EventData>
    <Data>HPS.LOCAL/Users/myriad</Data>
    <Data>https://exchange.abc.local:444/ecp/UsersGroups/EditRoomMailbox.aspx?pwmcid=4&ReturnObjectType=1&id=0b0a9f36-ace3-4e23-abda-124d61c5cb08(https://ramexchange/ecp/UsersGroups/EditRoomMailbox.aspx?pwmcid=4&ReturnObjectType=1&id=0b0a9f36-ace3-4e23-abda-124d61c5cb08)</Data>
    <Data>System.Web.HttpException (0x80004005): Request timed out.

</Data>
    <Data>Features:[[Global.DistributedKeyManagement, False],[Global.GlobalCriminalCompliance, False],[Global.MultiTenancy, False],[Global.WindowsLiveID, False],[Eac.AllowMailboxArchiveOnlyMigration, True],[Eac.AllowRemoteOnboardingMovesOnly, False],[Eac.CmdletLogging, True],[Eac.CrossPremiseMigration, False],[Eac.DiscoveryPFSearch, False],[Eac.DlpFingerprint, False],[Eac.GeminiShell, False],[Eac.Office365DIcon, False],[Eac.UnlistedServices, False],],  Flights:[],  Constraints:[[mode, enterprise],[user, myriad@],[org, ],[loc, en-US],], IsGlobalSnapshot: False</Data>
    <Data>ActivityId: </Data>
  </EventData>
</Event>

Also, as a test I created a NEW Distribution Group on the new 2013 server.  It allowed me to create it, but will not let me open it to edit.

This is the web page error when selecting to edit a group.....

This looks more IIS issue. Can you run iisreset command or restart your exchange 2013 server. Also cross check it with this KB
http://blogs.technet.com/b/meamcs/archive/2013/07/25/part-1-step-by-step-exchange-2007-to-2013-migration.aspx

I have restarted the server 2 times, installed CU7, and in addition the link above is the link I used for the migration.  I am able to log into ecp and edit everything EXCEPT distro groups.

I am able to edit the distro groups via powershell.

I agree with you.... It seems like an IIS issue, but I have no idea how to start troubleshooting this at all.

PLEASE HELP!!

Do you try to upgrade the DL version. I have same issue when migrate Exchange 2003 to Exchange 2007. DL whch migrated from Exchange 2003 to Exchange 2007 failed to be edited. I have to upgrade the DL version.

You may refer to this link:

http://theucguy.net/upgrade-distribution-groups-after/