I just upgraded to Outlook 2016 from 2010. I find when I am making a message and I misspell a word, and I right click on the red underline, I lost my option to pick a choice and select “AutoCorrect ” How do I get this back? Using File, Options, Proofing, AutoCorrect is too many steps.
The missing context menu option applies to suggestions for new AutoCorrect entries – you won't see a list of suggested AutoCorrect replacements for typos you make, as you did in Office 2010:
Microsoft removed this from the context menu in Word and Outlook to reduce clutter in the context menu. So many people complained to the Word Product Team in UserVoice that the Product team restored the Add to Autocorrect function, but it is a couple of extra steps and is not very obvious.
Create the Autocorrect entry yourself
Until Office 365 is updated (I don't have an ETA at this point in time), you'll need to create the AutoCorrect replacement yourself, if you want an AutoCorrect entry for that spelling. (You should still get a list of replacement words right-click menu for spelling errors when Check spelling as you type is enabled.)
Although typing the correction yourself, instead of selecting from the suggested list, adds several seconds to the chore and can be difficult if the word includes special characters, you can save some time by copying the correct text from the email or document and pasting it in the AutoCorrect dialog.
Copy the correct text then select the incorrect word. Open AutoCorrect dialog and the incorrect word should be in the Replace field. Paste the correction in the With field then click Add.
To make the AutoCorrect dialog easier to access, add the AutoCorrect Options command to your Quick Access Toolbar or the ribbon.
Open a new message form then go to File, Options, Quick Access Toolbar or Customize Ribbon, select Commands Not in the Ribbon. AutoCorrect Options is near the top of the list in Outlook.
Move or Copy the Autocorrect Entries
Can you move the AutoCorrect list to a new computer or create a backup copy? Sure. Unformatted AutoCorrect entries are stored in files with the .acl extension while formatted AutoCorrect entries are in the Normal.dotm template.
The ACL files are stored at C:\Users\%username%\AppData\Roaming\Microsoft\Office. You can access it by typing or pasting this shortcut into the address bar of Windows Explorer: %appdata%\microsoft\office
Templates are stored at C:\Users\%username%\AppData\Roaming\Microsoft\Templates, the shortcut is %appdata%\microsoft\templates