To configure Outlook to send plain text messages by default:Click the File menu, then select Options . An Outlook Options dialog box will open. On the left, click Mail . Under Compose messages , from the Compose messages in this format dropdown list, select Plain Text...Read more
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When sharing a mail folder or your calendar, you can choose what level of access to grant. Here's a list of the permission levels available in Outlook 2016 for Windows, listed from least access to most access.
Most people only need to set permission levels for their calendar, so...Read more