@Nang Hello, You're correct. I was quite easy. Once I entered one of the Office 2019 ProPlus VL-MAK keys which you published in your link above (7N3R7-3VDCH-Q7YH6-WTXBX-4JTT3), I called via Skype the Activation Support Service in the UK that is working 24/7. After entering the IID which I've got from the Office Activation Wizard using the Skype phone numeric pad I was informed that the automatic system couldn't validate the IID so I was transferred to a M$ Rep who furnished me with the CID which I entered in the Office Activation Wizard that was still open and finally my Office19_RTM19_ProPlus2019VL_MAK_AE edition got permanently activated. Rgds.

@nkoekn Open Skype and call this number in the United Kingdom: +44 800 018 8354. Follow the instructions to be received by phone. Choose Office for MAC to get an error and be transferred to a M$ Representative. Have the Office Activation Wizard open to copy the IID in the Skype numeric pad and then enter in the Office Activation Wizard the CID that you'll get from the M$ Rep . If you cannot get the Office Activation Wizard, please advise and I'll help you with a workaround. Rgds.