Using classic Outlook for Windows in business environments
Hi @PARKSANGUK ,
Welcome to Microsoft Q&A!
Currently in Microsoft Q&A we only support English, could you please edit your question into English? Then we can help to solve your issues, thanks for your understanding.
Then based on a quick machine translation, seems like you are having issues accepting a meeting request because its format is abnormal. From the screenshot, it's a meeting forwarded by someone, isn't it?
Before going further, it's suggested to check this meeting request via web mail and see if there's any difference.
If you cannot accept the meeting from the web mail either, in order to help narrow down the issue, please check if the problem also affects other meeting requests you received from either the same sender or anyone else. If this only occurs to the particular meeting, I'd recommend trying to contact the sender to try it again, and be sure to send the mail in the format of HTML:
In case I misunderstood anything, or you need further assistance, feel free to post back with more inforation in English.
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