Some people, especially in corporate environments, use the Outlook app as their primary email client.
However, even doing so sometimes doesnt work.
Sometimes, the problem is something else.
Let us now continue to see how to fix it.
In Microsoft Outlook, click File from the ribbon menu.
After relaunching Outlook, check to see if it resolved the problem.
In this case, simply changing Outlooks port(s) will deal with the issue.
In Microsoft Outlook, click File from the ribbon menu.Expand the File menu
Now click More tweaks.
Occasionally, they only block some of the IP addresses, including those of email servers.
If it does, then you should probably change your antivirus.
Learn how todisable Windows Defender (Windows Security).
Repair OST/PST File
OST and PSTare two types of Outlook data files.
A problem with these files can result in the 0X800CCC1A oops message.
Normally, if there is just one account on Outlook, the default PST/OST file is already selected.
If it does, then there is one more trick up our sleeves.
Enable TLS 1.2
TLS 1.2 is an encryption protocol.
Most mail servers support TLS 1.2 and 1.3 encryption protocols.
However, older operating systems like Windows 7 do not support it.
Now check to see if you still encounter the error when using Outlook.
Windows 7 requires a different method to enable TLS 1.2.
Therefore, we insist that you create asystem restore pointbefore proceeding forward with the process.
Set the Save as key in to All files, and then save the file.
This will create a Windows Registry file.
initiate the Registry file.
Click Yes when asked for confirmation.
When the file has been executed successfully, restart the computer.
When the computer restarts, relaunch Outlook and see if the problem has been mitigated.
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source: www.itechtics.com
