The file limitation for each message in Google Chrome, Electron or Paragon is 20MB in total, e.g. if you upload 3 files with 7MB each in the same message, it will exceed the limit.
The file limit for Internet Explorer is 9MB in total, e.g. if you upload 2 files with 5MB each in the same message, it will exceed the limit.
Note: Symphony no longer supports Internet Explorer 11 as of the Symphony v1.52 release
Note: Safari is not a supported browser
If the pod has Expression Filtering version 3 (EFv3) enabled, the file limitation is 5MB in total for each message.
Note: The aggregate attachments size limit is tied to the number of regexes you are using in EFv3, as well as to the number of cores per Symproxy. This can be further adjusted based on your company’s specific DLP deployment. Please contact your technical account manager or firstname.lastname@example.org for more information
There is no limit to the number of attachments that are allowed in a chat room. If a user is unable to see some attachments that other users can, the chat room may not have New Members can see past content enabled.
To check if past content can be viewed by new members, navigate to Chat Details by clicking on the i in the upper-right corner of the chat and find Member Permission (Figure 1):
Figure 1 Member Permission
Note: If this option is not enabled, new members will not be able to view historic messages and attachments