Are you saving the report to a trusted location on your machine? To designate a folder as a trusted location you need to open excel > File > Options > Trust Center. 

Try saving the report their and try executing it again.

@leadingzeros Yes we are….However the error occurs when clicking to open the client

Regards

shibu

Hi @SMANUEL ,

Solution: Uninstall the existing O365 version from users machine and reinstall as follows,

STEP1: Uninstall IFS Business Reporter

STEP2: Uninstall O365 with Beta Channel

STEP3: Reboot Users Machine

STEP4: Install O365 with Current Channel

STEP5: Install IFS Business Reporter and Test

It works..!!
 

Regards,

Vivek NR.

@VivekNR That worked  Many thanks for your support