Reduce file size in adobe scan

We're new to Adobe Scan but we have around 50 people using the system to scan and send documents to a central customer with a link for them to open.   The link can consist of maybe 60 scans.   The customer is complaining that the files are sometimes too large to load into their system, e.g. 71mb.   They're suggesting that we could scan documents in black and white to reduce the file size but I cannot find out how to do this or indeed, any other way of reducing the scan file size.   Any suggestions much appreciated!

Using scan on iphone.  Files are uploaded to cloud.  I actively need newer files but at a certain point I want to reduce clutter on Iphone and get rid of older files.  #1 - It seems files are totally syn'd so deleting from phone or online cloud  removes the file altogether.  IS there an archive function?  Would seem that Adobe would recognize not every file need to be on the phone.  #2 - If archiving the file from the phone is and option there seems to be no "Check box" or whatever that allows me to select multiple files for mass delete on phone making the process incredibly tedious.  Am I missing something?

Hi, I would like to scan documents for my business (finance-stuff) but the size of my scans is always to large (>1 MB, > 500 KB).

How can I reduce the size for every scan on Android?

Thanks

Cordula