Using older versions of Outlook for Mac for personal email and calendar
Dear Ludovica Not,
I hope you are doing well! Thank you for posting to Microsoft Community.
I have been investigating on this issue; however, I couldn't find any information related to this error message you are getting and would appreciate it if you could provide additional context or clarify your question for better understanding. Please provide the version of outlook you are using and the screenshot for the error message you are getting for further investigation.
Please be assured that I will make every effort to assist you with any difficulties you may be experiencing with Outlook for Mac. We look forward to hearing from you; Thank you for your cooperation.