IE REMOTE ACCESS:

Set the domain name or IP address of the DVR as trusted web site in your PC.

Uncheck the (https:) server verification.

IE browser >>> Tools >>> Internet Options… >>> Security >>> Trusted Sites

>>> Sites >>> Insert & Add IP >>> DISABLE (https:) server verification.

Lower the security level.

Custom Level >>> Security Level >>> Low >>> OK

Complete the setting, download the activeX and reflash the IE browser.