Skip to content
Franz Korbjuhn
Call +49 40 88192642 Send an email [email protected] Chat in Teams [email protected]
Articles

Category: IT security

Access rules, admin rights and protection features: how to secure Microsoft 365 and the environment behind it.

Emails pass through a filter gate with a shield into the office, suspicious messages with warning signs, one with a crown posing as the boss, end up in a quarantine box, and a copy of every email goes to the archive
IT security

Email security with Hornetsecurity – and when Business Premium fits better

Why I usually add Hornetsecurity for email protection when clients use Business Standard, how the switch works, and when I recommend Business Premium instead.

Read→
Floor plan of a practice with reception, treatment room, office, server room and a waiting area with Wi-Fi, all connected through a central firewall, with backups passing through a second stage into a data centre
IT security

IT for medical practices: network, backup and the KBV guideline

What the KBV's IT security guideline requires of practices, where the TI service provider's job ends, and how I set up the practice network and backup.

Read→
Servers and computers marked with red padlocks, next to a separate data vault from which the data flows back along a line
IT security

Ransomware attack: how a company with 60 employees was working again after 48 hours

Every computer and file share encrypted, but not the backups. How an offline backup brought a company back without paying a ransom, in which order the systems returned and what changed afterwards.

Read→
A central office building linked by secured connections to a factory, a warehouse and smaller businesses, one of them highlighted
IT security

NIS2: does it apply to my small business?

NIS2 has applied in Germany since December 2025, usually from 50 employees. Small businesses are still often affected, as suppliers or service providers to customers in scope.

Read→
Business Premium security features as switches, only a few of them turned on
IT security

Business Premium: paid-for security features nobody has switched on

Conditional Access, Intune, Defender and archiving are included in Business Premium but barely set up after purchase. What the licence contains, where I start and why PIM needs an add-on licence.

Read→