Appreciate your query over the Microsoft Q&A platform.
It is possible to configure Adobe Acrobat as the default PDF application on Microsoft 365 for all of the users in your organization. This can be done by installing Adobe Acrobat for Microsoft 365 using the Microsoft 365 Admin Center.
Please refer below URL for more info:
https://learn.microsoft.com/en-us/microsoftteams/adobe-acrobat-pdf-viewer-teams
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