Hi jackin, For your issue, please go to File->Options->Trust center->Trust Center Settings…->Email Security, and ensure that the “Encrypt contents and attachments for outgoing messages” and “Add digital signatures to outgoing messages” is unchecked.
To force Outlook 2007 or Outlook 2010 to show the Sign and Encrypt buttons, add the SecurityAlwaysShowButtons value to the registry. To do this, follow these steps: Exit Outlook. Start Registry Editor. In Windows Vista or in Windows 7: Select Start, type regedit in the Start Search box, and then press Enter.
Outlook stores all your email messages, meetings and events, contacts, and tasks in data files. These files occasionally might become corrupted. You can run the Inbox Repair Tool (scanpst.exe) to scan your Outlook data files and repair errors. Exit Outlook to use the Inbox Repair Tool.
You try to add an Internet calendar in Microsoft Outlook 2016, Outlook 2019, or Outlook for Office 365 by following these steps: Switch to the calendar module. In the Manage Calendars group on the toolbar, select Open Calendar. Select the From Internet option. Provide the path of your Internet calendar file. Select OK.
when starting outlook it gives message "cannot start Microsoft outlook. cannot open the outlook window. the set of folders cannot be open. the attempt to log on to Microsoft exchange has failed" Action Taken: 1. Start Outlook in Safe Mode - Still won't open 2. Create new Outlook Profile - Tried several times and still won't open 3.
Click on any entries that contain the words ‘Outlook’ or ‘MicrosoftOffice16’ in the name; Select ‘Remove’ Close Credential Manager and restart your Outlook; Ensure this is done for each entry that contains ‘Outlook’ or ‘MicrosoftOffice16’ in the name. Step by step process to access Outlook After enabling MFA: Close your outlook
The most important thing to know about signing and encrypting emails in Outlook Online is that you need to be using the Edge browser and an email account that uses Microsoft Exchange. If you’re using Outlook to read your email from Gmail, Yahoo Mail, or any provider that doesn’t use an Exchange server, this won’t work.