Office Professional Plus 2021 activation — Confirmation ID required

Think Nivesh 0 Reputation points
2026-09-25T04:11:38.2533333+00:00

I have Microsoft Office Professional Plus 2021. The Activation Wizard is showing an Installation ID and asking for a Confirmation ID. The telephone activation number shown for India is not working/available.

Please advise me on the official Microsoft-supported method to complete activation.

I have the product key and can provide additional information privately if required.

Microsoft 365 and Office | Install, redeem, activate | For business | Windows

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  1. AI answer

    2026-09-25T04:11:55.1566667+00:00

    For India, the current Microsoft activation phone number listed is +91 000 8000 404 453.

    To complete activation when the Activation Wizard is showing an Installation ID:

    1. Keep the Office Activation Wizard open.
    2. Use the displayed Installation ID.
    3. Call the Microsoft activation number for India: +91 000 8000 404 453.
    4. Provide the Installation ID when prompted.
    5. Enter the returned Confirmation ID into the Activation Wizard to complete activation.

    If the phone activation path does not work, Office Professional Plus 2021 is a volume-licensed product. Microsoft documents that volume-licensed Office products can also be activated by using the Volume Activation Management Tool (VAMT), including proxy activation for devices that do not have Internet access. In that method, the VAMT host collects the Installation ID, sends it to Microsoft, receives the Confirmation ID, and installs it on the client.

    If activation still fails after using the listed India number, the supported next step is to contact Microsoft Support for activation assistance.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Jade Ng 15,855 Reputation points Microsoft External Staff Moderator
    2026-09-25T05:17:20.2033333+00:00

    Dear Think Nivesh,

    Please try contacting the Microsoft Product Activation Center for India at +91 000 8000 404 453 to check whether telephone activation is available.

    Before calling, please keep the Microsoft Office Activation Wizard open. You will need to provide the Installation ID displayed in the wizard. If the activation request is successfully processed, you will receive a Confirmation ID, which you can enter into the Activation Wizard to complete the activation.

    User's image

    Reference: Telephone activation is no longer supported for your product" error when activating Office

    Tip: Support chat availability may vary by country/region, product, and support hours. If you can't get in touch with a chat agent right away, trying again later or at a different time may help.

    If the call does not connect or the activation is unsuccessful, could you please confirm where you originally purchased Office Professional Plus 2021? If the license was purchased through a Microsoft partner or another authorized reseller, I recommend contacting the seller or partner that provided the license. They should be able to verify the license and assist you with the appropriate activation method.

    I hope everything goes smoothly. Thank you so much for your patience. Please feel free to reply below if you have any update or further concern.  

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  3. Stefan Blom 353.6K Reputation points MVP Volunteer Moderator
    2026-09-25T07:37:38.31+00:00

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