MC277809 – Final Reminder: Adjusting Version Retention for Outlook Data Files (PST File Type) on One Drive and SharePoint (archived)

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check before: 2021-08-28

Product:

OneDrive, Outlook, SharePoint

Platform:

Online, World tenant

Status:

In development

Change type:

User impact, Admin impact

Details:

As communicated in MC256835 (May ’21), starting August 16th 2021 the service will retain 30 days worth of versions for any PST files stored OneDrive for Business and SharePoint Online team site document libraries. This change will prevent cases of previous versions of PST files quickly consuming available storage. The change will only impact previous versions of PST files stored in your document library storage.
As best practice PST files should not be uploaded on OneDrive for Business and SharePoint Online team site document libraries due to the impact on storage and network bandwidth. When PST files are uploaded on OneDrive for Business and SharePoint Online team site document libraries, Outlook updates PST files generating multiple versions which leads to storage being quickly consumed by the multiple versions of the PST file.
The SharePoint Online Management Shell cmdlet Set-SPOTenant – DisableOutlookPSTVersionTrimming $true can be used to opt out until August 13th 2021. This will have no effect after the deadline. Opt out only applies to existing document libraries and does not apply to new doclib created after August 13th 2021. New behavior will be automatically enabled if you don’t opt out by deadline.
Command: Get-SPOTenant/Set-SPOTenant
Parameter: DisableOutlookPSTVersionTrimming
Value: True - Opt-out to the versioning change
False - default value
This feature is associated with Microsoft 365 Feature ID: 72237

Change Category:
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Scope:
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Ring:
Targeted Release (Entire Organization)

Created:
2021-08-14

updated:
2021-08-14

task type:
Plan For Change

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