Logging allows you to trace back when what and maybe even how a breach happened. Another good resource is the sign-ins overview in the Azure Active Directory. Define a subset of users who are allowed to create groups, Check groups for activities to detect potentially stale ones, Make sure groups have more than one owner. Adding your logo to the Microsoft 365 login screen can mitigate phishing attempts because your users can better recognize the malicious login screen. Azure AD is at the core of security for M365, Azure VMs, Storage, and much more. If you create a Shared, Room, or Equipment Mailbox in Office 365, it will automatically also create an active user. Users can enable MFA through the following link https://aka.ms/mfasetup.
Business applications may be still using legacy protocols like SMTP or IMAP, preventing you from disabling them for everybody. 
Any time spent managing an organizations tenant on Azure (where Microsoft Office and other cloud offerings from Microsoft are hosted) demonstrates that, what you thought was familiar, is really unique. Basic or Legacy Authentication Protocols allow you to connect to Exchange Online without the use of Modern Authentication. Microsoft has created two preset security policies for Exchange Online, a standard, and a strict policy to secure your Office 365 mail. DMARC is a bit harder to configure, but nevertheless important as well. Well collaborated information for new tenant setup. Discover SysKit Point's newest features to maximize your efficiency and get full transparency over your Power BI, and Teams Shared Channels. You can also subscribe without commenting. These templates contain policies to protect your Exchange Online environment against the latest attack trends. But that comes with a risk, by default, anyone who gets the link can access the shared item. What you should do is block the sign-in on all the Shared Mailbox accounts. Recently, I have found one small tool very useful in measuring the maturity of your organization and its users. For IMAP, we can block the protocol for all the users that dont need it. There are a couple of things you should consider before enabling MFA. Gain visibility into entitlements to pinpoint privilege sprawl and ensure privileges are managed and right-sized. But that doesnt stop malicious apps from entering the app store. Inform the users about the upcoming change and give them time to migrate before you turn off the protocols. If your company holds public meetings with customers where you send out an open invitation that any can join then you will need to leave this setting enabled. The Wipro State of Cybersecurity Report 2020 found that the number of discreet entitlements has grown exponentially, to more than 40,000 permissions. Microsoft will start in Q2 of 2021 by automatically disabling the basic protocols that you are not using to secure Office 365. There have been a number of disruptions in the last 12 months so you need to monitor the status of Office 365 services closely to ensure the system is up and running. Get more product guides, webinar transcripts, and news from the Office 365 and SharePoint world! You can do this in the Admin Center or with PowerShell. Existing tenants however will need to keep up with the new security features and enable them manually to secure Office 365. Tim enjoys travelling around the world and exploring new cultures and engage with locals wherever he goes. Enforce least privilege across Windows, Mac, Linux, and Unix endpoints. The best way to implement MFA is based on conditional access. Now, OneDrive for Business is an ideal solution for this problem.
Give your users atleast the option to register multiple authentication methods, including Mobile app code. Our innovative Universal Privilege Management approach secures every user, asset, and session across your entire enterprise. This will recommend changing some settings that are not covered by the standard template that you should adopt: I also recommend using the free 365 Threat Monitor from Hornetsecurity. The best practice is to make sure all your privileged users have MFA enabled, and this also includes Global Admins. You can find the article here. Guests must sign in using the same account to which sharing invitations are sent, There are some other interesting option in this page also like the
You can also see the requests under Enterprise Applications > Admin consent requests. The problem with this token lifetime of an hour is that any changes in the users authorization are only detected after an hour at most. BeyondTrust helps you gain holistic visibility, control, and auditability over your Azure cloud identities and privileged access, including locking down access to M365. This allows guests to access shared documents with a one-time passcode instead of a Microsoft account. Redirect and move Windows known folders to OneDrive.
This points to the number one challenge we hear from cloud adopters at every stage of a digital transformation project visibility. Auto-inject the credentials to initiate a session to ensure they are never revealed to the end user, Provide an unimpeachable audit trail of the entire session in which the credentials were used, Alert when a session using the M365 credentials has been initiated and when it ends, Host a locked down web interface that is used only for M365, Implement an access control list (ACL) to only allow administrative access to O365 from trusted sources, For all connectivity, enforce 2FA regardless of password management and hardening, Create a break glass O365 administrative account, with a highly complex password. We leave the protocol only turned on for those few mailboxes that really need it. Make sure you are connected to Exchange Online and run the following cmdlet: You can also enable it in the Compliance Center. In the table, under the chart, you can choose the columns. With these mobile device management policies, you can control how filesare synced toyour mobile apps. Learn more in our External Sharing blog postor in the official documentation Manage sharing in OneDrive and SharePoint. This user doesnt have a license, but you can sign in with this user. Enabling multi-factor authentication (MFA) is the most recommended security measure to secure Office 365. So you cant disable MFA for one user or turn on the SMTP Authentication Protocol if you need it for a specific business application. I assume that your admins already have a proper habit of locking their device when they leave it unattended, but an extra security measure never hurts. In this blog, we will look at some of the SaaS security implications of M365 (based in Azure) versus the traditional Microsoft Office, which resides on the end users desktop. Check if all the system type policies are enabled by filtering the list on Status Off. You want to keep in control of who can access your data, so you should not allow guests to invite others. Allow guests to share items they dont own Even better, implement least privilege as part of a zero trust cloud security strategy. Celebrating Black History Month at BeyondTrust!
If you allow everyone to create as many groups as they want this will very soon become unmanageable chaos, and it takes so little to prevent it. Limit external sharing by domain. But if all the meetings are only business to business or directly with known clients/customers then its better to turn the anonymous access off. Make sure that Guests can invite is set to no. Before you can disable them you will need to make sure that your users and business applications are not using any of the protocols. If you have any questions, or recommendations that should be added to the guide, then please drop a comment below. If you still need to use IMAP, for example, then disable all the other authentication protocols that you dont need in the Admin Center (which I will explain in a bit). Subscribe to our blog and stay updated! For apps that do not support MFA, you can create app passwords. We can do this by disabling the protocols on all the mailbox plans (you can have multiple plans, each corresponds with its own license type). E.g. If you want to add these warnings to your tenant, then follow this guide. Access to the shared mailbox is managed with permissions. You can find the policies in the Security and Compliance Center: In addition to the security policy template, also check the Configuration Analyzer. An important part to keep Microsoft Office 365 secure is to regularly check the audit logs and keep up with the security recommendations in the Microsoft 365 Security Center. Before you enable security defaults in Office 365 you should keep a few things in mind. These settings include: If your tenant was created after October 21, 2019, then its possible that the security defaults setting is enabled for your tenant. Microsoft has already taken action to secure Office 365 further by verifying apps. Attackers can easily spoof your mail domain if you havent configured SPF, DKIM and DMARC. You will find the policies Microsoft 365 Compliance under Policies. With its built-in reports you will be able to pinpoint those users that are more vulnerable to real phishing attacks and further educate and secure them. To learn more navigate to:How it works: Azure Multi-Factor Authentication. If you click on the policy you will be redirected to the old Security and Compliance center where you can view all the policies.
This is a decent guide. This means that an attacker only needs a username and password to connect, which they can get after a successful phishing mail attempt. Helpdesk employees dont need to have Global Administrator access, for example, they could probably do their job with only the Helpdesk and User administrator role. Integrate with ITSM tools to layer on additional governance around the usage of M365 admin accounts, and with SIEM solutions for advanced threat analytics. You can change the password expiration in the Microsoft Office 365 Admin Center: Allow your users to self reset their password when needed. You can create the admin account in the Office 365 admin center under Users > Active Users > Add a user. To force the validation of the invited person you need to go here: LIVE DEMO: Get powerful insights into Power BI and Shared Channels. Add the IMAP4, POP3, and SMTP columns. To learn more navigate to:Add branding to your organizations Azure Active Directory sign-in. This familiarity provides a level of comfort. Figuring out who can do what takes combing through a few Microsoft Knowledge Base articles, and a table or two to decipher it. Users that are still using legacy protocols (older mail clients on mobile phones, or Apple Mail) should use the Microsoft Outlook app.
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