This guide suggests solutions to resolve Microsoft errors of type 0x800...

Preamble

• The various services offered by Infomaniak are all compatible with the corresponding standard protocols (IMAP/SMTP for email, for example), therefore if you encounter a problem with third-party software, contact its publisher or a Partner and consult the support policy as well as article 11.9 of the Infomaniak TOS.
• To find out what an error number (0x800CCCXX for example) corresponds to, refer to Microsoft's knowledge base or a virtual assistant.

0x800CCCDE

To attempt to resolve the following error:

Outlook cannot synchronize subscribed folders for email@domain.xyz. Error: An unexpected internal error occurred. It is suggested that you restart your client. If you continue to receive this message, contact your server administrator or Internet service provider (ISP)

1. Open Microsoft Outlook.
2. Click on File then on Options.
3. In the left menu, click on Advanced Options.
4. Click on the Send/Receive... button
5. Click on Modify.
6. Check the box Use the custom behavior below.
7. Check the folders to synchronize.
8. Check the box Download entire items (including attachments) for subscription folders.
9. Validate the changes and close the options window.

0x800CCC0E

1. Compare the recommended settings for the software used.
2. Refer to this other guide.
3. Contact Infomaniak support by communicating your public IP address.