Where do I go to increase my mailbox size? I need more than 100GB

Thank you, I did receive your response. When I went into upgrade my account, I was unable to upgrade my account office 365 enterprise E3/E5 or F3.

Any ideas on how to do that?

Hi Dana A1,

Thank you for your response. Sorry for delay response.

I am following your thread. As you mentioned | When I went into upgrade my account, I was unable to upgrade my account office 365 enterprise E3/E5 or F3. Any ideas on how to do that? |

Could you please allow me to collect below information from your side?

1. Currently what Office 365 License services you have?
2. Also, are you getting any error message when you upgrade license services? If possible, could you please share with me some detailed error message screenshot to understand particular situation?

These above requested information are required to understand your particular situation.

I will be waiting for your response. I will further provide information accordingly.

Sincerely,

Darpan

Hi Dana A1,

Good day.

I am writing to follow up on this thread. Do you need any other information or help?

Please feel free to contact us.

If I have provided prompt response, could you please provide your vote so that other community members can find information here who have similar concern?

Thank you so much for your kind cooperation.

Sincerely,
Darpan

Dear Dana A1,

Good day.

Thank you for posting in Microsoft Community.

I am writing to follow up on this thread.

As you mentioned | Where do I go to increase my mailbox size? I need more than 100GB |, for this scenario, first email provider is required information.

If mailbox account is Microsoft 365 Business / Enterprise exchange online mailbox account, generally we have this official document: Exchange Online limits - Service Descriptions | Microsoft Learn

Furthermore, if your subscription is from above provided screenshot information, to manage space on your Office 365 mailbox account, as Office 365 global admin may need to enable Archive mailbox for you via using admin center. Here is reference article for Office 365 global admin: Enable archive mailboxes for Microsoft 365 - Microsoft Purview (compliance) | Microsoft Learn

Mailbox archiving in Microsoft Purview is sometimes also called In-Place Archiving and provides users with extra mailbox storage space. After Office 365 global admin turn on archive mailboxes, a user's current mailbox becomes their primary mailbox and an additional mailbox is created, called the archive mailbox. 

Users can access and store messages in their archive mailboxes by using Outlook and Outlook on the web. Users can also move or copy messages between their primary mailbox and their archive mailbox. Learn about archive mailboxes for Microsoft Purview - Microsoft Purview (compliance) | Microsoft Learn

Note: if your subscription is from syndicate partner or any reseller partner, you may need to contact them to double check certain settings options from their side, because syndicate partner is managing admin center from their side, so certain place might be different to enable settings options.

If you have any different kind of mailbox account, you may need to provide brief information about it to understand particular scenario.

Above information is applicable for Office 365 Business / Enterprise / Education subscription related mailbox account. If I misunderstand anything wrong, please feel free to correct me with some brief information.

I would really appreciate your precious time and kind cooperation.

Stay safe and healthy.

Sincerely,
Darpan

As a component of Office 365? an Exchange mail account?