'Read timed out' error while migrating PST Outlook mail to Zoho Mail

'Read timed out' error while migrating PST Outlook mail to Zoho Mail

We are migrating our mail to Zoho over the long weekend.  I have followed all the instructions for the Zoho Migration Wizard for our Outlook users but I keep getting the message during the upload portion, "Item Name: Mail", "Error Description: Read timed out".  What do I need to do to fix this?  There are instructions for dealing with a Time Out problem, but they are no where near detailed enough for me to know what to do.  I am supposed to increase a parameter, but there is no clue where to find this parameter?

Thanks for your help - I did send the log to support yesterday but have not yet received a reply.

Sharla