Restrictions on File Names

Owned by Remillard, Jaryd
Last updated: Mar 20, 2020 by Spruiell, Marissa

While OneDrive for Business allows 1TB of cloud storage, allowing you to access your files from anywhere, there are file naming restrictions that will cause issues to sync your file to OneDrive. In order to experience optimal syncing with minimal issues, please either rename or refrain from using these characters in your filename or folder name.

Invalid characters – These characters in file names aren't supported when you sync OneDrive for Business

<, >, :, ", |, ?, *, /, \ , 

Any filename starting

with ~$

These file names aren't supported when you sync OneDrive for Business

Icon
.lock
CON
PRN
AUX
NUL
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM9
LPT0
LPT1
LPT2
LPT3
LPT4
LPT5
LPT6
LPT7
LPT8
LPT9
_vti_

These folder names aren't supported in OneDrive for Business_t
_w
_vti_


For more information, please visit this Microsoft article on filename restrictions.