How to change the 5MB attachment limitation
I have gotten a lot of questions about the 5 MB attachment limitation within Microsoft CRM. Yes this is possible to change.
You can increase this default by modifying the registry key maxuploadfilesize located in the registry by navigating to HKEY_Local_Machine\Software\Microsoft\MSCRM on the server and on the client in HKEY_CURRENT_USER\Software\Microsoft\MSCRMClient.
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft nor I cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
Updated: 18 March 2006