However, even a program created by a giant like Microsoft isn’t immune to the occasional bugs in the system. Such would be the case with Microsoft Outlook, as some users state that they have encountered an error message when using it. If you are also encountering this error message, follow this step-by-step guide for a solution to your problem.

What can I do if Outlook can’t open a custom form?

1. Check if Microsoft Outlook item uses a correct Form

If this doesn’t work, proceed to the next solution listed below.

2. Try to manually clear form cache

If this method doesn’t work either, you should check the integrity of your Microsoft Office install

3. Open Microsoft Outlook in Safe Mode

4. Uninstall any third-party add-ins

5. Install third-party repairing software for Outlook

If none of the methods listed above work, you could also try repairing your Office Installation or reinstalling it all together. Do you also receive this error message when using Microsoft Outlook? Do you know an extra solution we haven’t covered? Please let us know in the comments section below.

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