In IIS 7 or 7.5 when uploading attachments to the SBM database an error can be encountered with the file upload failing. By default IIS comes with a 30 MB file upload size limit. There are 2 locations to make modifications.
Go to C:\Program Files\Serena\Solutions\SOO\Framework\Shell. You will see 3 zip files. Copy them to C:\Program Files\Serena\ SBM \Application Engine\payload