Microsoft Outlook is a renowned email customer that allows you to oversee and send/get messages from your gadgets. In any case, the issue that the greater part of the Microsoft Outlook clients are confronting is that they can't send or get messages from the Outlook. Bunches of clients are seeing a mistake exchange with "Not Implemented" message at whatever point they click the Send/Receive email button from Outlook.
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Solution 1: Disable Antivirus Program
The antivirus application is configured to scan any email that is sent by you or received in your inbox. This scanning process can delay or hang up the process of sending and receiving email messages. Hence, it is advised to disable antivirus.
Solution 2: Disable Installed Add-Ins
Launch Outlook in Safe Mode to check for issues that are caused by add-ins. If Outlook works appropriately properly in Safe Mode, then disable add-ins from the Outlook.
Step 1: In Outlook, go to File > Option and select the Add-ins tab.
Step 2: Click on the Go button; a new pop-up dialog box will open.
Step 3: Disable one plug-in at a time.
Step 4: Restart the Outlook application.
Step 5: Finally, check for the issue solved or not.
Note: To open Outlook in safe mode, follow the below steps:
Hold +X keys. This will open up the Run dialog box.
Enter outlook.exe /safe in the text box.
Check the title bar for confirmation.
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Regards, Caleb