Microsoft Exchange On-Premise EWS ver 3.13.3 installation fails for SOAR on CentOS/RHEL 7 or Amazon Linux 2

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Updated:September 29, 2026

Document ID:SPLK048631

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Applicability

Splunk SOAR, Microsoft Exchange On-Premise EWS ver 3.13.3

Description

If user attempts to install Microsoft Exchange On-Premise EWS ver 3.13.3 for SOAR on CentOS/RHEL 7 or Amazon Linux 2, the App installation would fail.

Error below would be found in the "app_install.log":

ERROR: cryptography-43.0.1-cp39-abi3-manylinux_2_28_x86_64.whl is not a supported wheel on this platform.

Investigation

"cryptography-43.0.1-cp39-abi3-manylinux_2_28_x86_64.whl" is a Python wheel package to be installed as part of Microsoft Exchange On-Premise EWS ver 3.13.3 as dependency.

1) Breakdown of the filename:

cryptography-43.0.1: The package name (cryptography) and version (43.0.1).

cp39: CPython 3.9 – This wheel is built for Python 3.9 (compatible with later versions if abi3 is used).

abi3: Stable ABI (Application Binary Interface) – This means the wheel is compatible with multiple Python versions (e.g., Python 3.9, 3.10, 3.11).

manylinux_2_28: Linux distribution compatibility – This wheel requires glibc 2.28+, which means it only works on RHEL 8+, Ubuntu 20.04+, etc.
x86_64: CPU architecture – This wheel is built for 64-bit x86 (Intel/AMD) processors.

2) What does manylinux_2_28 mean?

manylinux_2_28 is a Python packaging tag that specifies which Linux distributions can run the package.

"manylinux" = A compatibility standard for Linux Python wheels.
"_2_28" = This means the package requires glibc 2.28 or later.
Older Linux versions (e.g., RHEL 7, CentOS 7, Amazon Linux 2) CANNOT use these wheels because they have older glibc versions (e.g., 2.17 or 2.26).

3) How to check if the system supports manylinux_2_28 ?

Run command "ldd --version"

$ ldd --version
ldd (GNU libc) 2.28

Resolution

Step1, Migrate the SOAR install to newer Linux versions like RHEL8, Oracle Linux 8, Amazon Linux 2023 by following documents linked below:
Migrate a Splunk SOAR (On-premises) install from RHEL 7 or CentOS 7 to RHEL 8

Migrate a Splunk SOAR (On-premises) install from CentOS 7 to Oracle Linux 8 Note: it is supported from SOAR 6.3.0

Migrate a Splunk SOAR (On-premises) install from Amazon Linux 2 to Amazon Linux 2023 Note: it is supported from SOAR 6.4.0

Step2, Install Microsoft Exchange On-Premise EWS ver 3.13.3 after migration.