Is SAP Business One Slow in the Cloud or over VPN? Causes and Fixes
"Reports take forever to open." "Login takes minutes." Most of these complaints come from one setup: the SAP program in the office talking to a database far away over a VPN. Here is why that is slow, the setup SAP recommends instead, and the other things that make reports slow — with fixes.
Why SAP Business One is slow over a VPN
SAP Business One talks to its database many times for every screen and report — small requests, one after another. On an office network each request takes less than a millisecond. Over a VPN across the internet, each one has to travel there and back, so thousands of small waits add up to a report that takes minutes.
SAP says this plainly in its hardware guide: all SAP Business One parts should be on the same local network, with a delay below 1 millisecond, and putting the SAP program and the server in different places "(e.g. VPN)" affects performance. For connections over the internet, SAP's guide says to use Remote Desktop.
| SAP program in your office, database in the cloud (over VPN) | Everything in the cloud, you log in by Remote Desktop | |
|---|---|---|
| What travels over the internet | Every database request and all report data | Only the picture of your screen, your typing and printouts |
| Reports and big lists | Slow — data is pulled across the internet | Run in the data centre, next to the database |
| Login and opening screens | Can take minutes on a long-distance link | Like working on the server itself |
| SAP's recommendation | Not recommended (same-network rule) | Recommended for internet connections |
Our Cloud for SAP uses the second setup: SAP Business One and its database run side by side on your private virtual servers in a Mumbai data centre, and your team logs in by Remote Desktop.
Using a VPN without slowing SAP down
A VPN link from your office to the cloud is fine when Remote Desktop runs inside it — Remote Desktop needs very little data. We include a VPN link free using an open-source VPN, and can add a paid VPN on request. These are the things that make a VPN slow, and what to do:
- Running the SAP program in the office over the VPN. The main cause. Keep SAP in the cloud and use Remote Desktop.
- VPN types that slow Remote Desktop. Microsoft notes that VPNs carried over TCP (many browser-style SSL VPNs) add their own delays to Remote Desktop and recommends UDP-based VPNs.
- Firewalls that inspect every packet. Deep inspection of Remote Desktop traffic adds delay. Microsoft advises avoiding packet-inspection services for Remote Desktop.
- Wrong packet size settings. A VPN adds a small header to each packet; if packet sizes are not adjusted, data gets split up and resent. A correct setting on the VPN device fixes it.
- All internet traffic forced through the VPN. Sending YouTube, updates and video calls through the same tunnel slows SAP. Send only SAP traffic through the VPN.
- An overloaded office router or firewall. Small devices may not keep up with encryption for a whole office. Check the device's VPN speed, not just its internet speed.
The extra data a VPN adds is small — a few percent. Plan your line with the internet speed calculator.
Reports slow in the cloud? Causes that are not the internet
- Server too small. SAP's guide says long reports, add-ons and searches need extra processor power, and that each virtual processor supports fewer than five people. Size the server for your busiest hour — see the server sizing calculator.
- Excel export on Remote Desktop. SAP support note 2937950 describes a large report "export to Excel (data only)" taking several times longer on a cloud server than on premises, caused by a default Windows Remote Desktop setting. Changing that setting fixes it.
- Printing through Remote Desktop. Office printers connected through Remote Desktop can be slow with some printer drivers. Choosing the right driver setting usually fixes it; very large print jobs also use more internet.
- Antivirus scanning the database. Antivirus should skip the database and log files; Microsoft recommends these exclusions for SAP on Windows servers.
- Big screens and many monitors. More screen area means more data to send. Microsoft's figures rise from about 1.5 Mbps per person on a normal screen to 3–5 Mbps for full HD.
- Weak office Wi-Fi. A poor Wi-Fi signal feels like a slow cloud. Use a cable connection for busy desks.
As part of our service we look after log clean-up and performance tuning on your SAP Business One servers.
Sources
- SAP Business One Hardware Requirements Guide — section 2.5: same-network rule, Remote Desktop for internet connections, users per processor.
- Microsoft — Remote Desktop over UDP — VPN type, packet inspection and routing advice.
- Microsoft — Remote Desktop network guidance — bandwidth per user and screen size.
- SAP support note 2937950 — slow Excel export on Remote Desktop (SAP support login needed).
- Microsoft — antivirus for SAP on Windows Server — database file exclusions.
Frequently Asked Questions
Will SAP Business One be slower in the cloud than on our office server?
Not when it is set up the way SAP recommends. SAP and its database run side by side in the data centre and you work through Remote Desktop, so reports run next to the data. A right-sized server and a steady internet line matter most.
Why is SAP Business One slow over VPN?
When the SAP program runs in your office and the database is far away, every one of its many small database requests crosses the internet. SAP's hardware guide warns that this setup affects performance and recommends Remote Desktop for internet connections.
Does a VPN or firewall slow down SAP in the cloud?
Not much when Remote Desktop runs inside it — the VPN adds only a few percent of extra data. Slowness comes from the wrong VPN type, firewalls that inspect every packet, wrong packet-size settings or sending all internet traffic through the VPN.
Why do reports take long to open?
Usually because the report data travels across the internet (SAP program in the office, database in the cloud), the server is too small for your busiest hour, or antivirus is scanning the database. Running SAP in the cloud with Remote Desktop and sizing the server correctly fixes most cases.
Why is exporting to Excel slow on Remote Desktop?
SAP support note 2937950 describes this: a default Windows Remote Desktop setting slows large "data only" exports. Changing that setting on the server fixes it.
Is a VPN included with your Cloud for SAP?
Yes. We include a VPN link from your office free, using an open-source VPN. If you prefer a paid VPN, we add it on request. We also set firewall rules so only your offices can connect.
Can people work from branches or from home?
Yes. Each place connects to the same SAP Business One in the cloud. Work out the internet line for each place from the number of people working there at the same time.
How do we know which server size gives good speed?
Use our server sizing calculator for a starting size based on SAP, Microsoft and AWS guidance, and choose more processors or memory if you run heavy reports or add-ons.
Want SAP that feels as fast as your office server?
Tell us your users, reports and offices, and we email you a quote for a setup sized for your busiest hour.
Last updated: 7 November 2026