Setting your out of office in Microsoft 365

When you're going to be away from the office for an extended period, it's important to let people know. One way to do this is by setting up an out of office message. Here's how to do it in Microsoft 365:

Step 1: Sign in to Your Account

Go to the Microsoft 365 sign-in page and enter your email address and password.

Step 2: Access the Outlook Web App

Once you're signed in, click on the "Outlook" icon. This will take you to the Outlook Web App.

Step 3: Access the Settings Menu

In the upper-right corner of the screen, click on the gear icon. This will open the Settings menu.

Step 4: Set Your Out of Office Message

In the Settings menu, click on "View all Outlook settings" at the bottom of the list. This will open the full settings menu.

In the settings menu, click on "Mail" in the left-hand menu. Then click on "Automatic replies" in the center panel.

Here you can set up your out of office message. You can choose to only send the message during a specific time period or to all incoming messages. You can also set different messages for people inside and outside of your organization.

Step 5: Save Your Changes

After you've set up your out of office message, click "Save" at the bottom of the page.

That's it! Your out of office message is now set up in Microsoft 365.

Decommission your on-premises Exchange servers after using hybrid migration

 As of writing (07/09/2020)  the short answer is:

1. Don't, at least not fully if you are keeping AD FS or AD Sync.

For the long answer see (https://docs.microsoft.com/en-us/exchange/decommission-on-premises-exchange) and the following blog (https://techcommunity.microsoft.com/t5/exchange-team-blog/decommissioning-your-exchange-2010-servers-in-a-hybrid/ba-p/597185)

But basically if you fully remove the Exchange system while still keeping AD Sync which is a requirement for AD FS too then your user admin tasks for Exchange 365 becomes more tricky as you will have no EMC on-perm but all the Exchange settings are still stored there and not be done via Microsoft 365.