Current (4.6.7) limits say that an activity can have up to 3 attachments, each being less than 2MB.

I need more, and a bigger file size limit.

What are the obstacles to achieving this?

  • I can't see anything in the db schema that implies a limit per activity, so is it just the UI that imposes the number of file limits?

  • The files are stored (I assume) in the civicrm_file.document field which is a MEDIUM_BLOB and can therefore store a file just under 4GB. (my requirements are only ~20MB.) Is that 2MB limit set in a PHP ini file?


2 Answers 2


Go to configure it in your settings /civicrm/admin/setting/misc?reset=1

  • Genius! Thanks! Couldn't see the wood for the trees! Aug 28, 2015 at 14:31

As a side note you might also need to increase PHP limits for larger files

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