Hi @Mahaveer ShrawanRam ,
Thanks for posting your question here.
The Outlook object library would only be installed if Outlook itself is installed.
What detailed version of Outlook are you using? (File > Office Account > About Outlook)
Try to run an Office Repair from Control Panel > Programs and Features > Right-click on Microsoft office and select Change
If issue persist, please do let me know and I'll do my best on continuing to help you.
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