How to Safely Share an Access Database Without OneDrive Conflicts
Question details
Users need a reliable method to share and collaboratively edit a Microsoft Access database without triggering sync conflicts on OneDrive or SharePoint.
- Product
- Microsoft Access
- Device & OS
- not provided
- Scenario
- Collaborating on a single database with multiple users across a network or cloud storage platform.
- Observed behavior
- Opening an Access database directly from OneDrive or SharePoint causes the file to download locally. Simultaneous editing results in sync conflicts, duplicate files, overwritten data, and unexpected software behavior.
Ensure all users have completely closed the Access database to prevent data corruption or locking issues before attempting to modify or move the files.
Split the Access Database and Host on a Local Network Share
The most reliable way to share an Access database for multiple users is to split it into a back-end (data) and front-end (interface), storing the back-end on a shared local network drive.
Microsoft Access does not support co-authoring via OneDrive or SharePoint document libraries. When opened from these locations, the file is downloaded locally, causing synchronization conflicts and duplicate file creation when multiple users make changes at the same time.
To allow simultaneous access, you must split the database and host the shared data on a traditional file server or local area network (LAN) share.
Launch Microsoft Access and open the database file you want to share.
Navigate to the 'Database Tools' tab on the ribbon. In the 'Move Data' group, click on 'Access Database' to launch the Database Splitter wizard.
Click 'Split Database' and follow the prompts to separate the database into a back-end file (which contains only the tables/data) and a front-end file (which contains queries, forms, and reports).
Move the newly created back-end database file to a shared network folder where all intended users have read, write, and delete permissions.
Distribute a copy of the front-end database file to each user's local hard drive. Users will open this local copy to interact with the shared data safely.
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Frequently Asked Questions
Why does OneDrive create duplicate copies of my Access database?
OneDrive syncs files by downloading a local copy to your device. If multiple users open the database from OneDrive simultaneously, each works on a separate local copy. When saving, OneDrive cannot merge the database changes internally and instead creates conflicting duplicate files to prevent data loss.
Can I use SharePoint to host a multi-user Access database?
No, opening an Access database directly from a SharePoint document library will cause the same downloading and syncing issues as OneDrive. To share the file properly, you should use a traditional network file server (LAN) instead.
What folder permissions are required for the shared network drive?
All users accessing the split database must have Read, Write, and Delete permissions on the shared network folder. Delete permissions are specifically required because Access automatically creates and deletes a temporary lock file (.laccdb) to manage multi-user record locking.
Is there any way to co-author an Access database online?
Native Access database files (.accdb) do not support online co-authoring natively. If you need a fully cloud-based relational database that supports simultaneous users across different locations, consider migrating your Access back-end data to Microsoft SQL Server, Azure SQL, or a web-based database platform.
