How do I use my Outlook.com calendar in my Outlook 2021 desktop app?

Ric Miller 0

I want to use my Outlook.com calendar in both my desktop and laptop Outlook 2021 desktop apps as well as my Android cell phone Outlook app.

My Outlook 2021 desktop apps use either pop3 or imap email accounts.

I am able to configure my android cellphone Outlook apps to use all of my imap accounts as well as my Outlook.com account with calendar but I cannot do the same for my desktop Outlook 2021 accounts.

I am trying to share the Outlook.com calendar among all devices. How do I do that.

Faery Fu-MSFT 18,796 Reputation points Microsoft Vendor

2024-04-12T09:34:51.0633333+00:00

Hi @Ric Miller ，

How did you configure the pop3/imap account to Outlook2021?

Please check the POP, IMAP, or SMTP settings: POP, IMAP, and SMTP settings for Outlook.com
Ric Miller 0 Reputation points

2024-04-12T16:40:33.3066667+00:00
Hi there,

Thanks for your response. I was able to use both IMAP and POP setting described on Microsoft site to connect to Outlook.com.

When I started my Outlook 2021 desktop client, the Outlook.com account was present, but the associated calendar was not both for IMAP and POP3.

That is what I am trying to do so I can use and share my Outlook.com calendar on all my devices.

Any ideas?

Here are the POP settings I used:

I used these settings:

Enable POP Access: Log in to your Outlook.com email account. Click the Settings gear icon and select View all Outlook settings. Go to the Mail tab and choose Sync email. Under POP and IMAP, select Yes under Let devices and apps use POP1.

Configure Your Email Client (e.g., Microsoft Outlook): Open your email client (e.g., Microsoft Outlook). Add a new email account. Choose to set up the account manually. Select POP as the account type. Enter the following settings based on your email provider’s documentation: Incoming server: pop-mail.outlook.com Outgoing server: smtp-mail.outlook.com Port numbers: Use 995 for incoming (with SSL encryption) and 587 for outgoing (with TLS encryption). Username: Your full Outlook.com email address. Password: Your email account password. Check the box for My outgoing server (SMTP) requires authentication. Optionally, uncheck Leave a copy of messages on the server if you don’t want to keep copies on the server. Click Next, then Finish.

Thanks,

Ric
Ric Miller 0 Reputation points

2024-04-12T16:41:59.7533333+00:00

Sorry - this was meant to be a response to your comment - not an answer.
Ric Miller 0 Reputation points

2024-04-12T16:49:47.4166667+00:00

Sorry - the answer I posted below was supposed to be my response to you.
Shawn Collins 615 Reputation points

2024-04-13T01:43:13.7633333+00:00

This may be of some interest.

https://support.microsoft.com/en-us/office/sync-basics-what-you-can-and-cannot-sync-5537d587-4930-4ac2-b044-3568509b1294#:~:text=Property%20Value%20%20Service%20%20%20%20Contacts,No%20%20%20No%20%20%20No%20
Ric Miller 0 Reputation points

2024-04-13T16:02:43.81+00:00

Hi Shawn,

Thanks for your post. It really tells me what I need to know in that adding an IMAP or POP account to my Outlook desktop will not sync the calendar from Outlook.com.

Is seems to confirm that I can sync the calendar if I add my Outlook.com account to my Outlook desktop that I will be able to sync both emails and calendar.

In fact, this is what I had been doing with Windows 10 and Outlook (MS Office) 2019 desktop. It did exactly what I wanted to do: I had my three POP or IMAP accounts (depending on which device I was using) and my Outlook.com account so I could share all email accounts and one Outlook.com calendar on all devices.

However, when I upgraded to Windows 11 and Outlook (MS Office) 2021 desktop and tried the same configuration, adding my Outlook.com account to Outlook 2021 desktop, it completely breaks the configuration of my IMAP or POP accounts (depending on which device I was using) and won't download emails from those accounts giving a failure notice and sometime will and sometimes won't bring over the Outlook.com calendar.

I have remove and added accounts repeatedly on multiple machines with inconsistent results and have downgraded my Office from 2021 to 2019 on Windows 11 with inconsistent results. However on Windows 10 and Office 2019 coexistence of POP or IMAP accounts and Outlook.com account works consistently as expected every time.

The article you provided seems to say this works, but perhaps only for the Office 365 Outlook desktop client. But is did work with Outlook 2019 on Windows 10 as expected.

I am trying to do something that is now not possible: Windows 11, Outlook (MS Office ) 2021 desktop. Add POP or IMAP accounts, add Outlook.com account, share same configuration on two machines and share POP or IMAP email accounts and one calendar from Outlook.com.

I added Outlook.com account as Outlook account, not as POP or IMAP.
Ric Miller 0 Reputation points

2024-04-13T21:12:36.2533333+00:00

Strictly speaking, I'm not trying to use any Outlook synchronizing feature. I just want to add my Outlook.com account and it's associated calendar (along with my other POP and/or IMAP accounts fro other ISPs) in my Outlook 2021 desktop on all of my devices.

I understand adding my Outlook.com account to Outlook 2021 desktop cannot be done by IMAP or POP connection, because those don't include the calendar.

When I add Outlook.com as an Outlook.com account on Outlook 2021, it screws up the connectivity of my POP and IMAP email and won't allow them to connect to their associated ISP servers.

I think the Outlook synchronizing feature is somehow causing this even though I didn't set it up that way.
Ric Miller 0 Reputation points

2024-04-14T17:19:39.2733333+00:00
Hi there,

I nearly have this figured out. Here is what I am trying to do and here is what makes it work:

3 Devices

Desktop 1 - Windows 10 MS Office Professional Plus 2019

Laptop 1 - Windows 10 MS Office Professional Plus 2019

CellPhone 1 - Samsung A10 Office 365 Outlook (free version)

3 Email Acounts

POP/IMAP 1 - My domain on my ISP (POP on desktop, IMAP on Laptop and Cellphone)

POP/IMAP 2 - My domain on my ISP (POP on desktop, IMAP on Laptop and Cellphone)

MS Exchange 1 - Outlook.com free account for calendar use only

Functionality

I install the 3 email account on three devices and use the 2 POP/IMAP accounts for my domain email accounts and use the MS Exchange account for the calendar only so I have the same calendar on all devices. The shared calendar is the only reason I am using the above configuration.

The above configurations and functionality on all devices and have been working just fine for years with no errors.

Migration and Problem

I am migrating to the following devices:

3 Devices

Desktop 2 - Windows 11 MS Office Professional Plus 2021

Laptop 2 - Windows 11 MS Office Professional Plus 2021

CellPhone 2 - Samsung S24 Office 365 Outlook (free version)

I added 3 email accounts to the above devices and Office softwares:

3 Email Acounts

POP/IMAP 1 - My domain on my ISP (POP on desktop, IMAP on Laptop and Cellphone)

POP/IMAP 2 - My domain on my ISP (POP on desktop, IMAP on Laptop and Cellphone)

MS Exchange 1 - Outlook.com free account for calendar use only

Problems

CellPhone 2 - Samsung S24 Office 365 Outlook (free version) functionality of share the MS Exchange calendar works just fine, the first time with no errors.

Both Windows devices worked just fine adding the POP/Email accounts, but both devices got completely borked when adding MS Exchange account.

The errors were multiple:

After adding the MS Exchange account, neither POP/IMAP account servers could be found

Outlook subsequently gave misc messages such as "resources low", "cannot start", etc. and finally would not start until I went to control panel > Mail > accounts and removed the MS Exchange account. I could then load Outlook and both my POP/IMAP accounts were just fine. I repeated this process multiple times and the exact same thing happened each time

Fixes

Both of my devices that I was migrating from Win 10 Office 2019 worked just fine so I copied the myemailaccount@outlook.com.ost from one of those devices to the devices I was migrating to.

I again added the MS Exchange account on the two devices I was migrating to. Outlook started, both POP/IMAP accounts functioned properly. The exchange account was present and the calendar for Outlook.com was available on all three devices now.

The only problem is that Outlook now complains that the version of ost file is out of date and to delete it and it would be rebuilt.

I did that on both devices. On one device the ost file was rebuilt and everything was just fine.

On the other device the ost was rebuilt and on starting Outlook, everthing was borked again. So I replace the ost file with the old one that worked and will endure Outlook's complaint message.

I would however like to know how this is supposed to work reliably because my solution is more of a bubble gum and bailing wire fix.

Surely there is a better way.

Share via

How do I use my Outlook.com calendar in my Outlook 2021 desktop app?

Your answer