Microsoft 365 Managed Support Plans - Flexible Retainer Services for Growing Businesses

Retainer Support Plans | MStack360 :root { --blue: #0099d8; --blue-dark: #007ab0; --blue-light: #e6f6fd; --green: #8dc63f; --green-dark: #6fa030; --green-light: #f0f8e6; --dark: #0a1628; --dark-2: #0f2847; --text:…

MStack360 Team

8 min read

managed services

Microsoft 365 Managed Support

Stop Letting Microsoft 365 Issues
Slow Your Business Down.

Your team spends hours on IT problems that should never reach them. Get a certified Microsoft 365 team managing everything every month. Trusted by 500+ businesses across North America, Europe, and the Middle East. Starting from $299/month.

View Plans → Talk to Us First

500+ Clients Served30-Day Satisfaction GuaranteeEnglish · German · ArabicMicrosoft Certified Specialists

Retainer Plans

Find the Right Plan for Your Team#

Select what your team needs and choose your team size below. The longer you commit, the more value you unlock. Pricing is personalised based on your team size and location.

1 What You Will GetFlex Monthly · Flexible support with no long-term commitment

  • Microsoft 365 admin support including users, licenses, and MFA
  • SharePoint and Teams foundational support
  • Weekly Microsoft 365 training session
  • Email support with responses within 24 hours
  • Cancel at any time with no penalties

Most PopularPriority 6-Month · Pay 6 Months, Get 7 Pay 6 Months, Get 7. One Free Month Added.

  • Full Microsoft 365 admin support
  • SharePoint, Teams and Intune support
  • Weekly Microsoft 365 training session
  • Priority response within 8 business hours
  • Monthly environment health check report
  • One Power Automate workflow per quarter

Best ValuePartner Annual · Pay 12 Months, Get 14 Pay 12 Months, Get 14. Two Free Months Added.

  • Full Microsoft 365 admin and security management
  • SharePoint, Teams, Intune and Power Platform coverage
  • Weekly Microsoft 365 training session
  • Priority response within 4 business hours
  • Monthly health check and Secure Score report
  • One Power Automate workflow per month
  • Quarterly strategic IT review call (1 hour)

2 Select your team size to get a quote

Team Size CommitmentFlex Monthly, no commitmentMost Popular Priority 6-Month, get 1 free monthBest Value Partner Annual, get 2 free months

Up to 10 users 10 hrs per month

10 hrs per month Response within 24 hrs Get a Quote

10 hrs per month Response within 8 hrs Get a Quote

10 hrs per month Response within 4 hrs Get a Quote

11 to 25 users 20 hrs per month

20 hrs per month Response within 24 hrs Get a Quote

20 hrs per month Response within 8 hrs Get a Quote

20 hrs per month Response within 4 hrs Get a Quote

26 to 50 users 35 hrs per month

35 hrs per month Response within 24 hrs Get a Quote

35 hrs per month Response within 8 hrs Get a Quote

35 hrs per month Response within 4 hrs Get a Quote

50+ users Custom hours

Enterprise and large teams We will build a fully custom plan around your team structure, tools, and goals. Contact Us for an Enterprise Quote

Transparent pricing, no hidden feesNo setup costsNo surprise charges, everExtra hours beyond your plan are billed at $30 per hour Need a Custom Plan or Extra Hours? Not sure which plan fits your needs? Have a larger project or a specific number of hours in mind? We will put together a tailored quote just for your business. Contact Us for a Custom Quote

Why MStack360

How We Compare to Your Other Options#

Before you decide, see how a retainer with MStack360 stacks up against the alternatives most businesses consider.

FeatureBest Value MStack360 Retainer PlanOther MSP General IT ProviderFull-time Employee In-house HireFreelancer Part-time / Project

Monthly cost

From $299/mo

$1,500–$4,000/mo

$6,500–$8,000/mo

Unpredictable

Microsoft 365 specialisation





Certified specialists





Response time

4–24 hrs guaranteed

24–72 hrs typical


No SLA

Scales with your team





Weekly training sessions





Monthly health reports





No hiring overhead





Contract flexibility

Month-to-month available

12-month minimum

Employment contract

Per project

Multi-language support

EN · DE · AR

Usually English only



Ex-Microsoft expertise





Dedicated point of contact





Showing MStack360 vs Other MSP. View the full comparison on a larger screen.

Average full-time Microsoft 365 admin salary: $75,000–$95,000 per year. Source: Glassdoor, LinkedIn Salary, 2025. Does not include benefits, payroll taxes, or recruitment costs.

The Process

Up and Running in 24 Hours#

From first conversation to active support in three simple steps. No lengthy onboarding, no disruption to your team.

1Free Consultation We review your Microsoft 365 environment together, identify your biggest pain points, and recommend the right plan for your team size and goals. 30 minutes 2Fast Onboarding We get secure access to your environment, run a full health assessment, and brief your dedicated specialist on your team structure and priorities. Within 24 hours 3Ongoing Support Starts Your team submits requests, attends weekly training sessions, and receives monthly reports. We manage, monitor, and continuously improve your M365 environment. Every month

What You Get

Your Microsoft 365 environment, fully managed and always optimised.#

From day-to-day admin to security hardening and automation, your retainer puts a certified Microsoft 365 team in your corner every single month.

500+ Businesses Supported 100% Satisfaction Guarantee 3 Languages Supported Microsoft Certified Ex-Microsoft Team Remote-First Global CoverageSecurity and Compliance MFA, Conditional Access, DKIM, DMARC, Secure Score hardening, and rapid phishing response. Your environment is protected before threats become problems. MFAConditional AccessDKIM / DMARCPhishing ResponseUser and License Management Onboarding, offboarding, license assignment, group policies, shared mailboxes, and distribution lists. Handled cleanly so your IT directory stays accurate. User LifecycleLicense OptimisationGroup PoliciesSharePoint and OneDrive Intranet design, permission management, sync issue resolution, and document library structure. Your team gets a collaboration space that actually works. Intranet DesignPermissionsSync FixesDocument LibrariesMicrosoft Teams and Communication Channels, meeting policies, Teams Phone configuration, and external collaboration setup. Your team communicates without friction, no matter where they are. Teams SetupTeams PhoneMeeting PoliciesPower Platform Automation Custom Power Automate flows and Power Apps that cut manual work and save your team hours every week. Automation built around how your business actually operates. Power AutomatePower AppsWorkflow DesignReporting and Strategic Insights Monthly health check reports, Secure Score summaries, and usage analytics. Your leadership gets clear, actionable visibility into your Microsoft 365 environment every month. Health ReportsSecure ScoreUsage AnalyticsWeekly Microsoft 365 Training Practical weekly sessions that upskill your team on the tools they use every day. Better adoption means better productivity and fewer support requests over time. Live SessionsPractical SkillsBetter Adoption

Client Reviews

Trusted by Businesses Across Three Continents#

Real Google reviews from clients across North America, Europe, and the Middle East.

5.0 500+ reviews across platforms Google · LinkedIn · Clutch C Carlton

Has helped with several solutions, full Power Apps and Power Automate.

L Luke

My firm had the pleasure of working with Ahmed Masoud and his team at MStack360, and the experience has been outstanding from start to finish. Their expertise in Microsoft 365 has been a game-changer for our organization.

P Paula

I was referred to Ahmed and his company to assist with IT problems I was having. He and his team have made something I really struggle with seamless and easy. Everything has been consolidated into one place with ease by the team. Highly recommended.

M Maxlevel

Omar and Ahmed did great work with our Microsoft Migration. 10/10, would recommend.

View More Google Reviews

FAQ

Your Questions Answered#

Which countries do you serve? + MStack360 serves businesses across North America, Europe, Australia, and the Middle East. We operate fully remotely and deliver all services in English, German, and Arabic, so wherever your team is based, we are ready to support you.What exactly is a retainer support plan? + A retainer gives your business a dedicated Microsoft 365 team on a fixed monthly fee. Rather than paying per ticket or per hour, you get ongoing expert support, proactive management, and continuous improvements every month. Think of it as your own in-house IT department without the overhead of hiring full-time staff.What does the 30-Day Satisfaction Guarantee cover? + If you are not satisfied with the quality of our work within the first 30 days of your plan, we will work to resolve every concern at no additional cost. If the issue cannot be resolved to your satisfaction, we will refund your first month in full. No complicated process, no disputes. We stand behind the quality of everything we deliver.What payment methods do you accept? + We accept wire transfer, card payments, and PayPal. All options are available at checkout and our team is happy to guide you through the payment process if needed.Is MStack360 a registered and official business? + Yes, absolutely. MStack360 is a fully registered and officially recognized business. You can engage with us with complete confidence knowing you are working with a legitimate, accountable company that stands behind every service it delivers.How do you handle security and what is your track record? + Security is at the core of everything we do. Several of our specialists are former Microsoft employees, bringing deep platform expertise and enterprise-grade security knowledge directly to your environment. We hold over 500 five-star reviews across Google, LinkedIn, and Clutch.LinkedInGoogle ReviewsHow does the free month bonus work? + When you choose the 6-month plan, you pay for 6 months and receive 7 full months of service. On the annual plan, you pay for 12 months and enjoy 14 months of complete support. Your bonus months are automatically applied at the end of your subscription period.What happens if I need more support than my plan includes? + We proactively notify you when you are approaching your monthly limit and present clear options. You can upgrade to a higher tier or add additional hours at a preferential client rate. Your business will never be left without coverage.Can I upgrade my plan at a later stage? + Yes, you can upgrade from the Monthly plan to the 6-Month or Annual plan at any time. We will apply a prorated adjustment and your bonus months will take effect from the start of your new term.

Ready to Elevate Your Microsoft 365 Experience?#

Book a free 30-minute consultation and we will recommend the right plan for your team, your goals, and your budget.

Book Your Free Consultation Contact Us

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WRITTEN BY

MStack360 Team

The MStack360 team delivers Microsoft 365 migrations, security and Power Platform projects for businesses across North America, Europe, Australia and the Middle East.

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