To increase that value first locate and open /etc/onlyoffice/documentserver/default.json config, then find "inputLimits" section and change the value for presentation extensions in "uncompressed" string:
Total size of the all XML data of the file can be checked. inputLimits parameter depends relies on this total uncompressed size of the file. To check the value of unpacked data you can create a copy of the file on the desktop, change extension of the copy to .zip and unarchive it to any folder - the total size of the folder is the total uncompressed size of your document. Based on that value, you can set up proper values in the config as per guide above.
I’m unable to find the default.json file located underneath the etc/onlyoffice/documentserver. I am currently running the OnlyOfficeDocumentServer through Unraid from the Community App Store created by Ascensio System SIA.
I went to the host files and /var/www/onlyoffice/documentserver to if the default.json file is there. Unfortunately it is not. Do you have recommendations on what I should do next?