The sign-in URL for OAuth authentication, for example outlook.office365.com.Office 365 offers some fantastic benefits over traditional on-premise infrastructure. Ignore the GUI, and check the status of the custom domain using Get-MSOLDomain using PowerShell.Use the Exchange settings to configure an Exchange Web Services account for. This is a common configuration issue as the Office 365 portal complains about missing DNS records. Note that in a hybrid configuration the external Autodiscover namespace must point back to the on-premises Exchange infrastructure and not to Office 365.For a lot of companies, Office 365 solves the problem of not requiring infrastructure, complicated exchange deployments and HA/DR as data is now in the cloud so is not the IT department's problem.The ‘Anytime and Anywhere Access to Office 365’ does, however, highlight the following security concerns for Office 365 deployed with ‘out of the box’ settings. In reality, most companies do not work this way and do not want to work this way. Office 365 Reporting Tool Capabilities Highlights:This blog will explore the last benefit – anytime and anywhere access to Office 365.As the image suggests, Office 365 means that we can all do our jobs from anywhere (coffee shop, pub, home) on any device we want to use. Office 365 Reporting Dashboards: This Microsoft 365 Reporting tool offers many analytical dashboards to cover all of your Office 365 and Exchange Online reporting and auditing needs. Another possible option is malware that abuses our infrastructure and sends outbound spam on behalf of our. Most of the time, the cause for Internal spam E-mail or outbound spam E-mail is a lack of awareness of our users.Emails can be cached offline and copied elsewhere on a home PC with Outlook. Office 365 can be accessed by just a username and password.From a data loss prevention point of view, this causes the following issues: Office 365 can be accessed from any device – not just corporate owned devices, any device (Personal Windows/Mac laptop, tablet, phone, any device with a browser or Outlook client installed).
VPNs control who can and cannot connect to on-premise data. Some clients accept this behaviour as being the new flexible working world, most clients do not and I can see the Security Manager fall off their chair about moving services to the cloud!The old solution to these issues with on-premise environments used to be VPNs. Multi-factor is not turned on by default for Office 365 – To login only a username and password is required.I always highlight this issue during my first workshop with a new client about to move some services to Office 365. SharePoint Online can be synced offline to a home PC and all data copied elsewhere/shared. OneDrive for Business can be synced offline to a home PC and all data copied elsewhere/shared. However, as with most things in life, it will cost you a bit extra. Can we provide additional security during login process – i.e., MFA?The answer to these security questions is yes: Azure offers Conditional Access to lock down Office 365. Can we lock down access to Office 365 to our corporate devices? Can we lock down access to Office 365 to our company offices? You will always get the person who is too important for this policy and wants to access everything from their personal iPad. Users/Groups – What users do you want to control – Users can be included/excluded from the policy if required. Policy ConditionsThe following conditions can be controlled by the policy: Conditional Access allows administrators to control what Office 365 apps users can gain access to based on if they pass/fail certain conditions.These conditions are enforced by building a policy (or multiple policies) to control how users access your Office 365 resources. SolutionMicrosoft introduced Conditional Access to resolve this problem. Internal And External Url For Office 365 Exchange Software The UserAllow browsers but disable mobile and desktop Outlook apps. Client App – Control what app/software the user is connecting from to the data – E.g. Cloud Apps- What apps do you want to control? Conditional Access does not need to apply to all of Office 365, you can be more granular and just control access to specific apps – E.g. If someone signs in from London then New York 30 mins later.Based on the conditions above, access can be allowed to Office 365 with the following conditions: Sign In Risk – Control signs in if Office 365/Azure thinks the sign in is not coming from the genuine user – E.g. Could limit this to the office external IP. Location – Control what IPs can connect to Office 365 – E.g. Allow Windows and iOS but block Android phones. Require approved app – You can select the requirement to grant access only if a connection attempt was made by an approved client app. Mobile Devices Azure AD registered and domain joined machines are set to automatically register in their Azure AD. Require domain joined (Hybrid Azure AD) – Devices must be Hybrid Azure AD joined – E.g. The device must match the Intune compliance policies to be able to connect. Require device to be marked as compliant – Device must be Intune compliant, E.g. Softonic photo editor for macBelow is the user experience if a user is on a non-domain joined machine: The following settings were configured in Azure Conditional Access.Allow access to Exchange Online based on device – I.e. The following Settings were configured in Azure Conditional Access.Block access to Exchange Online based on location.The following screen details the end user experience for a user accessing Office 365 from a device that is not coming from the corporate IP address.User logs into Office 365 with credentials.Azure Conditional Access identifies that the user is not coming from a trusted IP address and blocks access.Can we lock down access to Office 365 to our corporate devices?For this example, we have restricted access so that users can only connect to Office 365 if they are on a domain-joined device or mobile device that has been enrolled in Intune/Azure AD. MFA?Can we lock down access to Office 365 to our company offices?For this example, we have restricted access so that users can only connect to Office 365 if they are coming from the corporate IP range (external). Can we provide additional security during log on process – i.e. Let's take our three most common requests and show the user experience if they try and access Office 365 from non-compliant devices: Stop copying and pasting information out of these apps).The above settings offer a wide range of options for restricting access to Office 365. ![]() Don’t let your Office 365 migration be hindered by a non-future-proof app.If your organisation is thinking about your IT security, and how it can be improved, why not book a Security Workshop from Core? Our experts will assess and review your current security landscape, helping you to address and solve challenges, optimising the security of your IT and helping you comply with industry standards and regulations. Outlook Plugins) that don’t support above Outlook 2010, put pressure on the vendor to fix this. Upgrade to Outlook 2016 if your business is still using this it is 2018! Any 3 rd party apps (e.g.
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