Hi @Ayodeji Adeyemi ,
Welcome to forum!
Does this issue occur in Outlook desktop client? If so, please log in to Web mail to check if the meeting is shown in your calendar.
And does this issue occur with all meetings or specific meetings? If specific meetings, do they have in common?
If the meeting is shown on Web mail, please try the following steps to troubleshooting:
1.In Calendar View, click Reset View and search the missing meeting.
2.Please check if the missing meeting is in Deleted Items folder. If so, if you didn't move it to Deleted Items folder manually, it's suggested that you could check if you have applied some related rules.
3.If you are using an Exchange account, please disable Cache Mode and check if the meeting is shown in Online mode.
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