File Attachment Size Limitation Adjustments in Outlook and Webmail Print

1. Outlook will prevent users from attaching files larger than 20mb. You can increase this by editing the registry for Outlook.

https://learn.microsoft.com/en-us/outlook/troubleshoot/message-body/attachment-size-exceeds-the-allowable-limit-error

2. Webmail users are limited to 25MB maximum attachment sizes by default. This can be modified by editing the Domains.ini file in the \MDaemon\WorldClient\ directory.

[Default:Settings]

MaxAttachmentSize=25600

I hope this helps.

Regards,