Cisco L-CES-O365I-5Y-S10 O365 Inbound Security 5-Year | Cloud Licensing — L-CES-O365I-5Y-S10

Strengthen Microsoft 365 email protection with Cisco CES inbound security licensing built for enterprise mail environments. This 5-year subscription is sized for organizations with 20,000 to 49,999 users, giving security and procurement teams a clear fit for mid-enterprise deployment planning. The focus is inbound security for O365 mail flow, where malicious messages, phiJTFng attempts, and attachment-based threats often enter first. Cisco’s licensing model supports organizations that want to add a dedicated layer of protection around cloud email without changing the user experience or disrupting mail delivery. For teams managing risk across a large Microsoft 365 footprint, this SKU offers a practical way to standardize inbound email controls over a long term. The 5-year duration helps align security spend with platform roadmaps, while the user band makes it easier to match the license to the size of the environment. Ideal For Microsoft 365 inbound email protection programs Mid-enterprise phiJTFng and malware filtering Long-term cloud email security budgeting Standardized inbound mail controls for large user populations Why This Product 1 Purpose-built for Microsoft 365 inbound mail protection 2 Sized for 20,000-49,999 users rather than broad consumer or SMB use 3 Uses a 5-year term for stable enterprise planning 4 Focuses on inbound security, where email threats most often enter