Users on an on-premise AD domain controller and use Office 365 Exchange Online - active-directory

Is it possible to create Users on an on-premise AD domain controller and use "Office 365 Exchange Online" as the Exchange server with out creating the users on Office 365? or does one has to have it on both for to work?

Here's an overview for setting up directory sync for on-premises AD and O365.
And here's the Technet article that seems to walk you through each step.

Related

Ad connect - what data from Teams will be missing

My organisation use Active Directory on-premise (windows server 2012). We also use Office 365 E1.
Logins are different. We add accounts independly.
Now we are however are thinking about using Ad Connect, but we have some concerns.
Will we lose any data on Teams after integration?
Will our users be able to access data previously attached to theirs Azure Active Directory account?
How can we match AAD users with on-premise AD. It uses aliases?
Following MS documents should give a head start for your requirement.
How objects and credentials are synchronized in an Azure Active Directory Domain Services managed domain
Integrate on-premises AD with Azure
Integrate on-premises AD domains with Azure AD
Azure AD Connect: When you have an existing tenant
Microsoft 365 integration with on-premises environments

Azure AD integration with Office 365

Hello and thank you for reading.
We have Office 365 users and licenses and have recently moved into Azure. We want to connect these together.
I have created a domain controller but am unsure on how to add our existing domain in.
I have tried Azure AD Connect but it asks for 'AD Domain Services administrator', which we do not have. We have no on-premise AD at all, we want to start fresh in the cloud.
Any info would be greatly appreciated.
Thank you
If you have Office 365 license then you will have Azure Active directory services by default.
If you don't have any on-premises domain then there is no need for Azure AD connect.
Azure AD connect is used to sync the users from on-prem AD to Azure AD.
In order to add and register your existing domain in Azure , please follow this article (domain controller is not needed)

Azure B2B with SharePoint Online and Yammer

I have a scenario that I am hoping someone can assist me with. I have a requirement to build an extranet in SharePoint Online (Office 365).
We have a main Office 365 Tenant. There are 15 member organisations that need access and these DO NOT have Office 365. on premise only.
So I can use Azure B2B to grant access to SharePoint Sites no problems. I need the social aspect and Yammer Fits PERFECTLY but identities are separate.
I can create and External Yammer Network and invite users but obviously these are a separate set of credentials to that of Azure AD.
Has anyone done such a thing and is there a way to grant Azure B2B users access to an external Yammer network?
Yammer should allow you to sync with your Azure Active Directory. This should allow users to have the same logins.
Here is some information I found on this matter:
https://products.office.com/en-gb/yammer/yammer-network-administration

Sync Office 365 (AAD) with NEW on premise Active Directory

My small company (about 100 users) is currently using Office 365. There have previously not been any domain controller. I am building an on premise domain controller and want to sync it with Azure Active Directory (Office 365). I used the sync service, with a small subset of users to no avail.
My main question: Can you sync FROM an Azure Active Directory to a new on premise Active Directory? My understanding is that it's the opposite - the on premise Active Directory is the "master" if you will. Is there a way to set it up the opposite? As in, Office 365 being the "master" or "seed" for an on premise?
At present, the Azure AD connect support the Password writeback, Group writeback and Device writeback.
You can refer the options features of Azure AD Connect from here.
At this point in time, synchronizing users FROM Azure AD to on-premises AD is NOT possible.
As Fei Xue pointed out, there are certain things (such as user passwords, groups and devices) that can be synchronized back to on-prem AD, but not users.
Depending on what you are trying to achieve, Azure Active Directory DS might be worth exploring as it allows you to create a VNet in Azure which has a AD-like support (LDAP, Active Directory domain join, NTLM, and Kerberos authentication).
More info on Azure AD DS: https://azure.microsoft.com/en-us/services/active-directory-ds/

Exchange 2013 & AD (on-premise) to Office365 Migration path recommendation

I have the following setup:
Exchange 2013 on-premise with 10 users
AD on-premise
We have Office 365 premium licenses for each person in the company and have an Azure account etc.
I have been tasked with migrating the users to Office365 and also migrating AD
The Exchange Online licenses are not yet active, so currently, there are no user mailboxes on Office365.
We want Azure AD to replace our on-premise AD as at some point, the AD and Exchange servers (on-premise) will be decommissioned.
What path would be the best for me to take to do the migration?
I have read various pages on learn.microsoft.com about AD sync and AD Connect but am not sure whether or not this is the right way to go. the docs all seem to be geared towards companies needing a hybrid setup and we don't want that, ultimately.
Tips and advice will be gratefully welcomed.
Best regards,
Neil.

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