In Outlook 365 the From field is blank. You are also unable to change signature assignments in the Signatures dialog after upgrade from version 2002 (12527.20194) to version 2003 (12624.20176).
Change Insight's Focus Time Appointments
Add categories and change to Tentative the Focus Time appointments created by the Insights feature of Office 365 Exchange Online.
Outlook command lines using /m switch fail
Changes to Outlook version 2001 (Build 12430.20184) break the command line switch /m.
Clean up the Junk Email folder
How to use Rules or a macro to clear spam from Outlook's Junk Email folder.
View Read Receipt Request Indicator
All current versions of Outlook include a Read Receipt field, including Outlook 2010, 2013, 2016/2019/365. To see the Read Receipt indicator, you need to customize the view by adding the Receipt Requested field. For best results, you will need to use the Single Line view to see the read request field. To add the field
The Help function is disabled in Office apps
How to solve error message: This command isn't available: Your organization's administrator turned off the service required to use this feature
Warn Before Sending: Checking Contact Categories
Warn before sending mail macro: Check recipients contacts for specific categories before sending.
Delay sending a message with Outlook closed?
How to delay sending email messages with Outlook closed when you use a Microsoft Exchange or Office 365 mailbox.
Using Outlook’s Send to OneNote button
Use Outlook's Send to OneNote button to send Outlook items to the Onenote app.
Outlook Folder List: Unread Message Count Position
A recent update to Office 365 changed the position of the unread (or total) message count in Outlook’s folder list from following the folder name to right justified.