How to bulk create Office 365 mailboxes for existing AD users in Exchange hybrid configuration?…
What to do after installing the Hybrid Configuration Wizard (HCW)? After installing HCW, the on-premises Exchange environment is configured with Office 365. Is there an Exchange Hybrid test plan checklist, or can we start migrating the on-premises items to Office 365? I recommend using a checklist before migrating the mailboxes. You will create test items step by step in both environments and test thoroughly. In this article, we will have a look at the Exchange Hybrid test plan checklist.
I recommend to install a separate Exchange Server 2016 and install HCW on it. Then you can keep the Exchange Server 2016 running and decommission the other Exchange Servers.
Exchange Hybrid test plan checklist
Before you start the migration to Office 365 from your Exchange on-premises environment, what’s better than making sure that everything is working? That’s why I recommend going through the Exchange Hybrid test plan checklist document.
Create the test items, as shown in the table one by one. After creating them, test if it’s working. If it’s not working, troubleshoot and fix the issues.
|Office 365 user mailbox||Create a user mailbox in Office 365, test GAL visibility in both organizations, and test hybrid mail flow between organizations||✓|
|Office 365 shared mailbox||Create a shared mailbox in Office 365, test GAL visibility in both organizations, and test hybrid mail flow to the mailbox|
|Office 365 resource mailbox||Create a room mailbox in Office 365, test GAL visibility in both organizations, and test making a booking|
|Distribution group membership changes||Create a distribution group on-premises, add an on-premises and cloud mailbox, and test that mail to the DG delivers to both recipients|
|Office 365 Groups integration||Create an Office 365 Group, test GAL visibility on-premises, test that mail is delivered to on-premises members|
|Shared mailbox access and Send-as||Test that on-premises and cloud mailbox users can access shared mailboxes cross-premises, and Send-as permissions work|
|Delegate mailbox access and Send-on-behalf||Test that on-premises and cloud mailbox users can edit calendars that they are delegates for, and Send-on-behalf permissions work|
You can download the document from here.
Planning and testing are essential. You don’t want to see that users can’t connect to shared mailboxes. Or that they can’t look into the calendar of their colleagues. More issues can go down the road once you start migrating without testing first.
I hope that the checklist document will help you to create an easy migration to Office 365.
Keep reading: Hybrid Configuration Wizard fails to connect »
In this article, we looked at the Exchange Hybrid test plan. Remember to use the checklist and test the items one by one. Do that before starting the migration of the mailboxes to Office 365.
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