Outlook Farben/Kategorien kann man nicht auswählen

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I understand how frustrating it can be when your Outlook Calendar color categories suddenly disappear after a Windows 10 reset and reinstallation of Outlook 365. Allow me to ask:

• What version and edition of Office do you have installed in your device? Example: Personal/Family/Enterprise? You can open any Office apps Go to File > Accounts - on the right side you can see Product Information
• I would like to know what @domain and who is hosting your email account? example for @domains: Gmail.com, Yahoo.com, Outlook.com/Hotmail.com
• Is this happening to other devices as well?

Let’s troubleshoot this issue and find a solution for you. Here are some steps you can try to restore your color categories:

1.0 *Check IMAP Account Compatibility:

1.1. First, let’s address the possibility that color categories might not be supported in IMAP accounts. If you’re using an IMAP account, the color categories feature may not work as expected. You can try using a macro to add categories as an alternative.

1.2 Additionally, ensure that your Office applications are up to date .My outlook calendar's categories look as they have been grayed out. - Microsoft Community - This was answered by an Independent Advisor Dighi and some of the Community members. You may check this link for more information and also the link is a year old.

2.0 *Restore Categories from Backup:

2.1 Since you backed up your Outlook data separately as PST files before the Windows 10 reset, you can try restoring your color categories from the backup.

2.2 Locate the Categories.msg file from your backup (usually found in the Notes folder).

2.3 Drag and drop the Categories.msg file into the Notes folder.

2.4 Go back to the Mail navigation window, right-click the Mailbox folder, and choose Data File Properties.

3.0 *Clear Auto-Complete Cache:

3.1 Sometimes, cached data can cause issues. Try clearing the Auto-Complete cache in Outlook: Go to the File tab, select Options, and navigate to the Advanced tab. Under the “Outlook Start and Exit” section, click on the “Empty Auto-Complete List” button to clear the cache.

4.0 Verify Outlook Version:

4.1 You mentioned that you downloaded Outlook 365 from the Microsoft website. Ensure that you have the correct version installed.

4.2 While the cloud-based options appeared during installation, make sure you’re using the desktop version of Outlook 365 (not the web-based version).

5.0 Recreate Categories Manually:

5.1 If all else fails, you can manually recreate your color categories by assigning colors to appointments one by one.

5.2 Right-click an appointment, choose Categorize, and select a color.

5.3 Repeat this process for other appointments.

Remember to back up your current Outlook data before making any changes. If you encounter any issues, consider reaching out to Microsoft support for personalized assistance. I hope this helps resolve the color category mystery!