Why does the Image posting to a Dropbox™ account stop functioning after 4 hours?
This is mainly due to the change in the Dropbox™ security policy. Starting on September 30th 2021, Dropbox™ has changed to short-lived access tokens, which expire after four hours. This means that if the Bosch IP cameras has configured a Dropbox™ account to store the Image Posting files to a Dropbox™ account, the connectivity to the Dropbox™ will become invalid after 4 hours due to the expired token. A re-authentication is required to resume the connectivity.
Affected platform : CPP 4, CPP 6, CPP 7, CPP 7.3, CPP-ENC
An alternative solution is to setup a local FTP server and store the Image Posting to the FTP Server.
One of the free FTP solution can be FileZilla Server which is a free open source FTP and FTPS Server.
Note: Dropbox is a trademark of Dropbox, Inc.